You must be logged in to add problems to this category

brute force problems
Problem Name Online Judge Year Contest Difficulty Level
1 Burger Time? Categories UVA 1
2 Tavas and SaDDas Categories Codeforces Codeforces Round #299 (Div. 2) 1
3 Beru-taxi Categories Codeforces Codeforces Round #367 (Div. 2) 1
4 Number of Ways Categories Codeforces Codeforces Round #266 (Div. 2) 1
5 Counterexample Categories Codeforces Codeforces Round #275 (Div. 2) 1
6 Soldier and Badges Categories Codeforces Codeforces Round #304 (Div. 2) 1
7 Hexadecimal's theorem Categories Codeforces Codeforces Round #125 (Div. 2) 1
8 Fraction Categories Codeforces Codeforces Round #433 (Div. 2, based on Olympiad of Metropolises) 1
9 Dreamoon and WiFi Categories Codeforces Codeforces Round #272 (Div. 2) 1
10 Two Substrings Categories Codeforces Codeforces Round #306 (Div. 2) 1
11 Watermelon Categories Codeforces Codeforces Beta Round #4 (Div. 2 Only) 1
12 Pangram Categories Codeforces Codeforces Round #295 (Div. 2) 1
13 Minimum Difficulty Categories Codeforces Codeforces Round #283 (Div. 2) 1
14 Bear and Raspberry Categories Codeforces Codeforces Round #226 (Div. 2) 1
15 Han Solo and Lazer Gun Categories Codeforces Codeforces Round #291 (Div. 2) 1
16 Mike and palindrome Categories Codeforces Codeforces Round #410 (Div. 2) 1
17 Fedor and New Game Categories Codeforces Codeforces Round #267 (Div. 2) 1
18 Triangle Categories Codeforces Codeforces Beta Round #6 (Div. 2 Only) 1
19 Jeff and Digits Categories Codeforces Codeforces Round #204 (Div. 2) 1
20 Soldier and Cards Categories Codeforces Codeforces Round #304 (Div. 2) 1
21 Panoramix's Prediction Categories Codeforces Codeforces Beta Round #69 (Div. 2 Only) 1
22 Taymyr is calling you Categories Codeforces Codeforces Round #395 (Div. 2) 1
23 Appleman and Easy Task Categories Codeforces Codeforces Round #263 (Div. 2) 1
24 Kefa and First Steps Categories Codeforces Codeforces Round #321 (Div. 2) 1
25 Lucky Sum of Digits Categories Codeforces Codeforces Beta Round #84 (Div. 1 Only) & Codeforces Beta Round #84 (Div. 2 Only) 1
26 Lucky Division Categories Codeforces Codeforces Beta Round #91 (Div. 2 Only) 1
27 Lala Land and Apple Trees Categories Codeforces Codeforces Round #312 (Div. 2) 1
28 Team Categories Codeforces Codeforces Round #143 (Div. 2) 1
29 Cut Ribbon Categories Codeforces Codeforces Round #119 (Div. 2) 1
30 Preparing Olympiad Categories Codeforces Codeforces Round #306 (Div. 2) 1
31 Array Categories Codeforces Codeforces Round #181 (Div. 2) 1
32 Generous Kefa Categories Codeforces Codeforces Round #429 (Div. 2) 1
33 The Artful Expedient Categories Codeforces Codeforces Round #439 (Div. 2) 1
34 Vasya and Socks Categories Codeforces Codeforces Round #262 (Div. 2) 1
35 Ice Skating Categories Codeforces Codeforces Round #134 (Div. 1) & Codeforces Round #134 (Div. 2) 1
36 System of Equations Categories Codeforces Codeforces Round #131 (Div. 2) 1
37 Games Categories Codeforces Codeforces Round #164 (Div. 2) 1
38 Magic Numbers Categories Codeforces Codeforces Round #189 (Div. 2) 1
39 Kyoya and Photobooks Categories Codeforces Codeforces Round #309 (Div. 2) 1
40 Bus to Udayland Categories Codeforces Codeforces Round #369 (Div. 2) 1
41 Amr and Pins Categories Codeforces Codeforces Round #287 (Div. 2) 1
42 Maximum in Table Categories Codeforces Codeforces Round #289 (Div. 2, ACM ICPC Rules) 1
43 I_love_\%username\% Categories Codeforces Codeforces Round #109 (Div. 2) 1
44 Books Categories Codeforces Codeforces Round #171 (Div. 2) 1
45 Karen and Morning Categories Codeforces Codeforces Round #419 (Div. 2) 1
46 TL Categories Codeforces Codeforces Round #203 (Div. 2) 1
47 Expression Categories Codeforces Codeforces Round #274 (Div. 2) 1
48 Divisibility by Eight Categories Codeforces Codeforces Round #306 (Div. 2) 1
49 Arpa’s hard exam and Mehrdad’s naive cheat Categories Codeforces Codeforces Round #383 (Div. 2) 1
50 IQ test Categories Codeforces Codeforces Beta Round #25 (Div. 2 Only) 1
51 Vladik and Courtesy Categories Codeforces Codeforces Round #416 (Div. 2) 1
52 Parallelepiped Categories Codeforces Codeforces Round #138 (Div. 2) 1
53 Giga Tower Categories Codeforces Codeforces Round #278 (Div. 2) 1
54 Beautiful Year Categories Codeforces Codeforces Round #166 (Div. 2) 1
55 Mike and Fax Categories Codeforces Codeforces Round #305 (Div. 2) 1
56 Flipping Game Categories Codeforces Codeforces Round #191 (Div. 2) 1
57 Playing with Dice Categories Codeforces Codeforces Round #222 (Div. 2) 1
58 Fence Categories Codeforces Codeforces Round #211 (Div. 2) 1
59 Play with Dates Categories SPOJ 1
60 Candy Categories SPOJ 1
61 The Monster Categories Codeforces Codeforces Round #406 (Div. 2) 1
62 Gerald's Hexagon Categories Codeforces Codeforces Round #313 (Div. 1) & Codeforces Round #313 (Div. 2) 1
63 QAQ Categories Codeforces Codeforces Round #447 (Div. 2) 1
64 Far Relative’s Birthday Cake Categories Codeforces Codeforces Round #343 (Div. 2) 1
65 Grouping Problem Categories TJU 1
66 Cakeminator Categories Codeforces Codeforces Round #192 (Div. 2) 1
67 Candy I Categories SPOJ 1
68 Thor Categories Codeforces Codeforces Round #366 (Div. 1) & Codeforces Round #366 (Div. 2) 2
69 Game Outcome Categories Codeforces Codeforces Round #110 (Div. 2) 2
70 Second Order Statistics Categories Codeforces Codeforces Beta Round #22 (Div. 2 Only) 2
71 Mr. Kitayuta's Colorful Graph Categories Codeforces Codeforces Round #286 (Div. 1) & Codeforces Round #286 (Div. 2) & Codeforces Round #286 (Div. 1) & Codeforces Round #286 (Div. 2) 2
72 Kitahara Haruki's Gift Categories Codeforces Codeforces Round #248 (Div. 2) 2
73 Pizza Separation Categories Codeforces Codeforces Round #448 (Div. 2) 2
74 GRADE POINT AVERAGE Categories SPOJ 2
75 Far Relative’s Problem Categories Codeforces Codeforces Round #343 (Div. 2) 2
76 Mr. Kitayuta's Gift Categories Codeforces Codeforces Round #286 (Div. 1) & Codeforces Round #286 (Div. 2) & Codeforces Round #286 (Div. 1) & Codeforces Round #286 (Div. 2) 2
77 George and Round Categories Codeforces Codeforces Round #227 (Div. 2) 2
78 Parallelogram is Back Categories Codeforces Codeforces Round #388 (Div. 2) 2
79 New Year and Old Property Categories Codeforces Good Bye 2015 2
80 Hexadecimal's Numbers Categories Codeforces Codeforces Beta Round #9 (Div. 2 Only) 2
81 Simple Molecules Categories Codeforces Codeforces Round #200 (Div. 2) 2
82 Ebony and Ivory Categories Codeforces Manthan, Codefest 16 2
83 Cutting Banner Categories Codeforces Codeforces Round #300 2
84 Robot Sequence Categories Codeforces 8VC Venture Cup 2016 - Elimination Round 2
85 Ice Sculptures Categories Codeforces VK Cup 2012 Qualification Round 1 2
86 IQ Test Categories Codeforces Codeforces Round #176 (Div. 2) 2
87 Chtholly's request Categories Codeforces Codeforces Round #449 (Div. 2) 2
88 Prizes, Prizes, more Prizes Categories Codeforces Codeforces Round #130 (Div. 2) 2
89 Valuable Resources Categories Codeforces Codeforces Round #276 (Div. 2) 2
90 Hamburgers Categories Codeforces Codeforces Round #218 (Div. 2) 2
91 Interview Categories Codeforces Codeforces Round #344 (Div. 2) 2
92 Pasha and Pixels Categories Codeforces Codeforces Round #288 (Div. 2) 2
93 Ilya and tic-tac-toe game Categories Codeforces Codeforces Round #390 (Div. 2) 2
94 Hacking Cypher Categories Codeforces Codeforces Round #279 (Div. 2) 2
95 Mike and strings Categories Codeforces Codeforces Round #410 (Div. 2) 2
96 Multiplication Table Categories Codeforces Codeforces Round #256 (Div. 2) 2
97 Tourist's Notes Categories Codeforces Codeforces Round #300 2
98 Help Vasilisa the Wise 2 Categories Codeforces Codeforces Round #102 (Div. 2) 2
99 Triangular numbers Categories Codeforces Codeforces Beta Round #44 (Div. 2) 2
100 Bear and Strings Categories Codeforces Codeforces Round #226 (Div. 2) 2
101 Polo the Penguin and Matrix Categories Codeforces Codeforces Round #177 (Div. 2) 2
102 Drazil and His Happy Friends Categories Codeforces Codeforces Round #292 (Div. 1) & Codeforces Round #292 (Div. 2) & Codeforces Round #292 (Div. 1) & Codeforces Round #292 (Div. 2) 2
103 2Char Categories Codeforces Codeforces Round #329 (Div. 2) 2
104 Bear and Three Musketeers Categories Codeforces Codeforces Round #318 [RussianCodeCup Thanks-Round] (Div. 2) 2
105 Little Elephant and Magic Square Categories Codeforces Codeforces Round #157 (Div. 2) 2
106 Little Elephant and Chess Categories Codeforces Codeforces Round #157 (Div. 2) 2
107 Lucky Substring Categories Codeforces Codeforces Beta Round #91 (Div. 2 Only) 2
108 Another Problem on Strings Categories Codeforces Codeforces Round #112 (Div. 2) 2
109 Shower Line Categories Codeforces Codeforces Round #247 (Div. 2) 2
110 Kirill And The Game Categories Codeforces Codeforces Round #430 (Div. 2) 2
111 Restoring Painting Categories Codeforces Codeforces Round #353 (Div. 2) 2
112 Removing Columns Categories Codeforces Codeforces Round #283 (Div. 2) & Codeforces Round #283 (Div. 1) 2
113 Okabe and Banana Trees Categories Codeforces Codeforces Round #420 (Div. 2) 2
114 Little Dima and Equation Categories Codeforces Codeforces Round #262 (Div. 2) 2
115 Ohana Cleans Up Categories Codeforces Codeforces Round #309 (Div. 2) 2
116 Shooshuns and Sequence Categories Codeforces Codeforces Round #137 (Div. 2) 2
117 Bear and Three Balls Categories Codeforces IndiaHacks 2016 - Online Edition (Div. 1 + Div. 2) 2
118 Pride Categories Codeforces Codeforces Round #446 (Div. 1) & Codeforces Round #446 (Div. 2) 2
119 Mr. Kitayuta's Colorful Graph Categories Codeforces Codeforces Round #286 (Div. 1) & Codeforces Round #286 (Div. 2) & Codeforces Round #286 (Div. 1) & Codeforces Round #286 (Div. 2) 2
120 Sail Categories Codeforces Codeforces Round #180 (Div. 2) 2
121 Link/Cut Tree Categories Codeforces Codeforces Round #339 (Div. 2) 2
122 Vicious Keyboard Categories Codeforces Codeforces Round #409 (rated, Div. 2, based on VK Cup 2017 Round 2) 2
123 Little Elephant and Rozdil Categories Codeforces Codeforces Round #129 (Div. 2) 2
124 Towers Categories Codeforces Codeforces Round #274 (Div. 2) 2
125 Football Kit Categories Codeforces Codeforces Round #246 (Div. 2) 2
126 Petya and Countryside Categories Codeforces Codeforces Beta Round #61 (Div. 2) 2
127 Letters Categories Codeforces Codeforces Round #481 (Div. 3) 2
128 Economy Game Categories Codeforces Codeforces Round #357 (Div. 2) 2
129 Dima and Continuous Line Categories Codeforces Codeforces Round #208 (Div. 2) 2
130 Strongly Connected City Categories Codeforces Bayan 2015 Contest Warm Up 2
131 Alyona and copybooks Categories Codeforces Codeforces Round #381 (Div. 2) 2
132 Group of Students Categories Codeforces Codeforces Round #207 (Div. 2) 2
133 Bicycle Chain Categories Codeforces Codeforces Round #132 (Div. 2) 2
134 Prime Matrix Categories Codeforces Codeforces Round #166 (Div. 2) 2
135 Case of Fake Numbers Categories Codeforces Codeforces Round #310 (Div. 2) 2
136 Lucky Numbers (easy) Categories Codeforces Codeforces Beta Round #77 (Div. 2 Only) 2
137 Vladik and fractions Categories Codeforces Codeforces Round #384 (Div. 2) 2
138 Mike and Fun Categories Codeforces Codeforces Round #305 (Div. 2) 2
139 Phone Code Categories Codeforces Croc Champ 2012 - Qualification Round 3
140 Permutations Categories Codeforces Rockethon 2015 3
141 Reconnaissance Categories Codeforces Codeforces Beta Round #32 (Div. 2, Codeforces format) 3
142 Vasya and Basketball Categories Codeforces Codeforces Round #281 (Div. 2) 3
143 Cows and Poker Game Categories Codeforces Codeforces Round #174 (Div. 2) 3
144 Tic-tac-toe Categories Codeforces Codeforces Beta Round #3 3
145 Vanya and Scales Categories Codeforces Codeforces Round #308 (Div. 2) 3
146 Primes or Palindromes? Categories Codeforces Codeforces Round #315 (Div. 1) & Codeforces Round #315 (Div. 2) 3
147 Triangle Categories Codeforces Codeforces Round #239 (Div. 1) & Codeforces Round #239 (Div. 2) 3
148 Perfect Pair Categories Codeforces Codeforces Round #188 (Div. 1) & Codeforces Round #188 (Div. 2) 3
149 King of Thieves Categories Codeforces ZeptoLab Code Rush 2015 3
150 Pythagorean Theorem II Categories Codeforces Codeforces Round #183 (Div. 2) 3
151 Karen and Game Categories Codeforces Codeforces Round #419 (Div. 1) & Codeforces Round #419 (Div. 2) 3
152 Finding Team Member Categories Codeforces Codeforces Round #320 (Div. 2) [Bayan Thanks-Round] 3
153 Unbearable Controversy of Being Categories Codeforces Codeforces Round #277.5 (Div. 2) 3
154 Colorful Graph Categories Codeforces Codeforces Round #151 (Div. 2) 3
155 Mike and Cellphone Categories Codeforces Codeforces Round #361 (Div. 2) 3
156 Inna and New Matrix of Candies Categories Codeforces Codeforces Round #234 (Div. 2) 3
157 Sereja and Bottles Categories Codeforces Codeforces Round #187 (Div. 2) 3
158 Ball Game Categories Codeforces School Personal Contest #2 (Winter Computer School 2010/11) - Codeforces Beta Round #43 (ACM-ICPC Rules) 3
159 Sagheer, the Hausmeister Categories Codeforces Codeforces Round #417 (Div. 2) 3
160 Heads or Tails Categories Codeforces Codeforces Round #149 (Div. 2) 3
161 Mahmoud and a Message Categories Codeforces Codeforces Round #396 (Div. 2) 3
162 Polo the Penguin and Segments Categories Codeforces Codeforces Round #177 (Div. 2) 3
163 The Text Splitting Categories Codeforces Educational Codeforces Round 4 3
164 Two Problems Categories Codeforces Codeforces Round #128 (Div. 2) 3
165 A Trivial Problem Categories Codeforces Manthan, Codefest 16 3
166 Block Towers Categories Codeforces 8VC Venture Cup 2016 - Elimination Round 3
167 Secret Combination Categories Codeforces Codeforces Round #283 (Div. 2) 3
168 Masha and geometric depression Categories Codeforces Codeforces Round #407 (Div. 2) 3
169 Vasya and Robot Categories Codeforces Codeforces Round #206 (Div. 1) & Codeforces Round #206 (Div. 2) 3
170 Catch Me If You Can Categories SPOJ 3
171 A + B Strikes Back Categories Codeforces April Fools Day Contest 2014 3
172 Robbers' watch Categories Codeforces Codeforces Round #359 (Div. 1) & Codeforces Round #359 (Div. 2) 3
173 Color Stripe Categories Codeforces Codeforces Round #135 (Div. 2) 3
174 Noldbach problem Categories Codeforces Codeforces Beta Round #17 3
175 Little Xor Categories Codeforces Codeforces Round #153 (Div. 2) 3
176 Coach Categories Codeforces Codeforces Round #181 (Div. 2) 3
177 Let's Watch Football Categories Codeforces Codeforces Round #123 (Div. 2) 3
178 Point on Spiral Categories Codeforces Codeforces Round #171 (Div. 2) 3
179 Bear and Prime Numbers Categories Codeforces Codeforces Round #226 (Div. 2) 3
180 Students and Shoelaces Categories Codeforces Codeforces Beta Round #94 (Div. 2 Only) 3
181 Dima and To-do List Categories Codeforces Codeforces Round #214 (Div. 2) 3
182 Dress'em in Vests! Categories Codeforces VK Cup 2012 Round 1 3
183 Kalevitch and Chess Categories Codeforces Codeforces Beta Round #7 3
184 An impassioned circulation of affection Categories Codeforces Codeforces Round #418 (Div. 2) 3
185 Art Union Categories Codeforces Codeforces Round #241 (Div. 2) 3
186 Funky Numbers Categories Codeforces Codeforces Round #121 (Div. 2) 3
187 Gennady the Dentist Categories Codeforces Codeforces Round #325 (Div. 1) & Codeforces Round #325 (Div. 2) 3
188 Searching for Graph Categories Codeforces Codeforces Round #236 (Div. 2) & Codeforces Round #236 (Div. 1) 3
189 "Or" Game Categories Codeforces Codeforces Round #320 (Div. 1) [Bayan Thanks-Round] & Codeforces Round #320 (Div. 2) [Bayan Thanks-Round] 3
190 Non-square Equation Categories Codeforces Codeforces Round #144 (Div. 2) 3
191 LLPS Categories Codeforces Codeforces Round #127 (Div. 2) 3
192 Bear and Compressing Categories Codeforces IndiaHacks 2016 - Online Edition (Div. 1 + Div. 2) 3
193 Common Divisors Categories Codeforces Codeforces Round #117 (Div. 2) 3
194 Tennis Game Categories Codeforces Codeforces Round #283 (Div. 2) & Codeforces Round #283 (Div. 1) 4
195 Walking in the Rain Categories Codeforces Codeforces Round #121 (Div. 2) 4
196 Ksusha and Array Categories Codeforces Croc Champ 2013 - Round 2 (Div. 2 Edition) 4
197 Sereja and Prefixes Categories Codeforces Codeforces Round #223 (Div. 1) & Codeforces Round #223 (Div. 2) 4
198 Remove Extra One Categories Codeforces Codeforces Round #450 (Div. 2) 4
199 Little Pony and Harmony Chest Categories Codeforces Codeforces Round #259 (Div. 1) & Codeforces Round #259 (Div. 2) 4
200 Little Elephant and Sorting Categories Codeforces Codeforces Round #129 (Div. 2) 4
201 Promocodes with Mistakes Categories Codeforces VK Cup 2016 - Qualification Round 1 4
202 Vanya and Triangles Categories Codeforces Codeforces Round #308 (Div. 2) 4
203 Brute-force Algorithm Categories Live Archive 2009 Asia - Shanghai 4
204 Tournament Categories Codeforces Codeforces Beta Round #27 (Codeforces format, Div. 2) 4
205 Spongebob and Squares Categories Codeforces Codeforces Round #332 (Div. 2) 4
206 Dima and Text Messages Categories Codeforces Codeforces Round #208 (Div. 2) 4
207 Arthur and Table Categories Codeforces Codeforces Round #311 (Div. 2) 4
208 Shifts Categories Codeforces Codeforces Round #142 (Div. 1) & Codeforces Round #142 (Div. 2) 4
209 Sereja and Swaps Categories Codeforces Codeforces Round #243 (Div. 1) & Codeforces Round #243 (Div. 2) 4
210 DZY Loves Modification Categories Codeforces Codeforces Round #255 (Div. 1) & Codeforces Round #255 (Div. 2) 4
211 Chord Categories Codeforces Codeforces Beta Round #73 (Div. 2 Only) 4
212 Letter Categories Codeforces Codeforces Round #116 (Div. 2, ACM-ICPC Rules) 4
213 Office Keys Categories Codeforces Codeforces Round #424 (Div. 1, rated, based on VK Cup Finals) & Codeforces Round #424 (Div. 2, rated, based on VK Cup Finals) 4
214 View Angle Categories Codeforces Codeforces Round #159 (Div. 2) 4
215 New Problem Categories Codeforces Codeforces Round #170 (Div. 2) 4
216 Palindrome pairs Categories Codeforces VK Cup 2012 Qualification Round 2 4
217 Game of the Rows Categories Codeforces Codeforces Round #428 (Div. 2) 4
218 Balls Game Categories Codeforces Codeforces Round #245 (Div. 2) 4
219 Strange Addition Categories Codeforces Codeforces Round #184 (Div. 2) 4
220 String Manipulation 1.0 Categories Codeforces VK Cup 2012 Qualification Round 2 4
221 You're Given a String... Categories Codeforces Codeforces Beta Round #23 4
222 Fire Again Categories Codeforces Codeforces Beta Round #35 (Div. 2) 4
223 MUH and House of Cards Categories Codeforces Codeforces Round #269 (Div. 2) 4
224 Undoubtedly Lucky Numbers Categories Codeforces Codeforces Round #150 (Div. 2) 4
225 Fight the Monster Categories Codeforces Codeforces Round #278 (Div. 1) & Codeforces Round #278 (Div. 2) 4
226 Tell Your World Categories Codeforces Codeforces Round #431 (Div. 2) 4
227 Devu and Partitioning of the Array Categories Codeforces Codeforces Round #251 (Div. 2) 4
228 Amity Assessment Categories Codeforces CROC 2016 - Elimination Round 4
229 Alice, Bob, Two Teams Categories Codeforces Educational Codeforces Round 9 4
230 Spit Problem Categories Codeforces Codeforces Beta Round #29 (Div. 2, Codeforces format) 4
231 Three Logos Categories Codeforces Codeforces Round #322 (Div. 2) 4
232 Pair of Numbers Categories Codeforces Codeforces Round #209 (Div. 2) 4
233 Magic Box Categories Codeforces Codeforces Round #143 (Div. 2) 4
234 Counting Rhombi Categories Codeforces Codeforces Round #119 (Div. 2) 4
235 Amr and Chemistry Categories Codeforces Codeforces Round #312 (Div. 2) 4
236 Trees in a Row Categories Codeforces Codeforces Round #236 (Div. 2) 4
237 Weird Chess Categories Codeforces Codeforces Round #300 4
238 Lucky Mask Categories Codeforces Codeforces Round #104 (Div. 2) 4
239 Almost Arithmetical Progression Categories Codeforces Codeforces Round #156 (Div. 2) & Codeforces Round #156 (Div. 1) 4
240 Captain Marmot Categories Codeforces Codeforces Round #271 (Div. 2) 4
241 Hometask Categories Codeforces Codeforces Round #131 (Div. 2) 4
242 Elevator Categories Codeforces School Regional Team Contest, Saratov, 2011 4
243 Minion Circle Categories CodeChef 4
244 Fox And Jumping Categories Codeforces Codeforces Round #290 (Div. 2) & Codeforces Round #290 (Div. 1) 4
245 Message Categories Codeforces Codeforces Round #110 (Div. 1) & Codeforces Round #110 (Div. 2) 4
246 Ancient Prophesy Categories Codeforces Codeforces Round #158 (Div. 2) 4
247 Mountain Scenery Categories Codeforces Codeforces Round #134 (Div. 2) 4
248 Triangle Categories Codeforces Codeforces Beta Round #18 (Div. 2 Only) 4
249 Wonder Room Categories Codeforces Codeforces Round #266 (Div. 2) 4
250 ZgukistringZ Categories Codeforces Codeforces Round #307 (Div. 2) 4
251 Predict Outcome of the Game Categories Codeforces Codeforces Round #258 (Div. 2) 4
252 Resort Categories Codeforces Codeforces Round #203 (Div. 2) 4
253 Orchestra Categories Codeforces 8VC Venture Cup 2016 - Final Round (Div. 2 Edition) & 8VC Venture Cup 2016 - Final Round (Div. 1 Edition) 4
254 Beautiful Numbers Categories Codeforces Codeforces Round #181 (Div. 2) 4
255 Roads not only in Berland Categories Codeforces Codeforces Beta Round #25 (Div. 2 Only) 4
256 Xenia and Spies Categories Codeforces Codeforces Round #199 (Div. 2) 4
257 Choosing Laptop Categories Codeforces Codeforces Beta Round #82 (Div. 2) 4
258 Running Student Categories Codeforces Codeforces Beta Round #9 (Div. 2 Only) 4
259 Kolya and Tandem Repeat Categories Codeforces Codeforces Round #253 (Div. 2) 4
260 TWO BISHOPS Categories SPOJ 4
261 Two Tables Categories Codeforces Codeforces Round #141 (Div. 2) 4
262 Help Farmer Categories Codeforces Codeforces Round #102 (Div. 1) & Codeforces Round #102 (Div. 2) 5
263 Boulevard Categories Codeforces 2015-2016 ACM-ICPC, NEERC, Southern Subregional Contest (Online Mirror, ACM-ICPC Rules, Teams Preferred) 5
264 Inversions problem Categories Codeforces Rockethon 2015 5
265 PFAST Inc. Categories Codeforces Codeforces Beta Round #86 (Div. 2 Only) 5
266 Petya and His Friends Categories Codeforces Codeforces Beta Round #61 (Div. 2) 5
267 Rectangle and Square Categories Codeforces Codeforces Beta Round #97 (Div. 1) & Codeforces Beta Round #97 (Div. 2) 5
268 Martian Dollar Categories Codeforces Codeforces Beta Round #40 (Div. 2) 5
269 Brute-force Algorithm EXTREME Categories SPOJ 5
270 Ksusha the Squirrel Categories Codeforces Croc Champ 2013 - Round 2 (Div. 2 Edition) 5
271 Bargaining Table Categories Codeforces Codeforces Beta Round #22 (Div. 2 Only) 5
272 Jury Size Categories Codeforces Codeforces Round #155 (Div. 2) 5
273 Vasily the Bear and Sequence Categories Codeforces Codeforces Round #195 (Div. 2) 5
274 Restore Cube Categories Codeforces Codeforces Round #265 (Div. 1) 5
275 Calendar Categories Codeforces Codeforces Round #183 (Div. 2) 5
276 Shopping Categories Codeforces Educational Codeforces Round 12 5
277 Number With The Given Amount Of Divisors Categories Codeforces Codeforces Beta Round #27 (Codeforces format, Div. 2) 5
278 Om Nom and Candies Categories Codeforces ZeptoLab Code Rush 2015 5
279 Four Segments Categories Codeforces Codeforces Beta Round #14 (Div. 2) 5
280 Robot Bicorn Attack Categories Codeforces Codeforces Round #115 5
281 Roman and Numbers Categories Codeforces Codeforces Round #235 (Div. 2) 5
282 Fancy Number Categories Codeforces Codeforces Beta Round #89 (Div. 2) 5
283 Mike and Frog Categories Codeforces Codeforces Round #305 (Div. 1) & Codeforces Round #305 (Div. 2) 5
284 4-point polyline Categories Codeforces MemSQL Start[c]UP 2.0 - Round 1 5
285 Series of Crimes Categories Codeforces Croc Champ 2012 - Round 2 (Unofficial Div. 2 Edition) 5
286 Continued Fractions Categories Codeforces Codeforces Round #184 (Div. 2) 5
287 Bitwise Formula Categories Codeforces Codeforces Round #402 (Div. 1) & Codeforces Round #402 (Div. 2) 5
288 Counting Rectangles is Fun Categories Codeforces Codeforces Round #219 (Div. 1) & Codeforces Round #219 (Div. 2) 5
289 Compatible Numbers Categories Codeforces Codeforces Round #112 (Div. 2) 5
290 Skills Categories Codeforces Codeforces Round #339 (Div. 1) & Codeforces Round #339 (Div. 2) 5
291 Chocolate Categories Codeforces Codeforces Round #279 (Div. 2) 5
292 Game on Paper Categories Codeforces Codeforces Round #128 (Div. 2) 5
293 The Queue Categories Codeforces Codeforces Round #398 (Div. 2) 5
294 Fibonacci-ish Categories Codeforces Manthan, Codefest 16 5
295 Network Mask Categories Codeforces Croc Champ 2013 - Qualification Round 5
296 Chess Categories Codeforces School Personal Contest #1 (Winter Computer School 2010/11) - Codeforces Beta Round #38 (ACM-ICPC Rules) 5
297 Jerry's Protest Categories Codeforces 8VC Venture Cup 2016 - Elimination Round 5
298 Vasya and Beautiful Arrays Categories Codeforces Codeforces Round #206 (Div. 1) & Codeforces Round #206 (Div. 2) 5
299 Borya and Hanabi Categories Codeforces Codeforces Round #253 (Div. 1) & Codeforces Round #253 (Div. 2) 5
300 Petr# Categories Codeforces Codeforces Beta Round #86 (Div. 1 Only) & Codeforces Beta Round #86 (Div. 2 Only) 5
301 Broken checker Categories Codeforces April Fools Day Contest 5
302 Accounting Categories Codeforces Codeforces Beta Round #30 (Codeforces format) 5
303 Nearest Fraction Categories Codeforces Codeforces Round #172 (Div. 2) 5
304 Permutations Categories Codeforces Codeforces Beta Round #92 (Div. 2 Only) 5
305 Clothes Categories Codeforces Codeforces Beta Round #79 (Div. 2 Only) 5
306 Hanoi Factory Categories Codeforces Codeforces Round #401 (Div. 2) 5
307 Chocolate Bar Categories Codeforces Educational Codeforces Round 1 5
308 Candy Boxes Categories Codeforces Codeforces Round #278 (Div. 2) 5
309 Three Sons Categories Codeforces School Regional Team Contest, Saratov, 2011 5
310 Beauty Pageant Categories Codeforces Codeforces Round #151 (Div. 2) 5
311 Average Numbers Categories Codeforces Codeforces Testing Round #3 5
312 CGCDSSQ Categories Codeforces Bayan 2015 Contest Warm Up 5
313 New Year Letter Categories Codeforces Good Bye 2013 6
314 Hot Bath Categories Codeforces Codeforces Beta Round #93 (Div. 1 Only) & Codeforces Beta Round #93 (Div. 2 Only) 6
315 Wonderful Randomized Sum Categories Codeforces Codeforces Beta Round #33 (Codeforces format) 6
316 Time to Raid Cowavans Categories Codeforces Codeforces Beta Round #80 (Div. 1 Only) & Codeforces Beta Round #80 (Div. 2 Only) 6
317 Encrypting Messages Categories Codeforces ABBYY Cup 2.0 - Easy 6
318 Party Categories Codeforces ABBYY Cup 2.0 - Easy 6
319 Bulls and Cows Categories Codeforces Codeforces Beta Round #59 (Div. 2) 6
320 Little Elephant and Elections Categories Codeforces Codeforces Round #157 (Div. 1) & Codeforces Round #157 (Div. 2) 6
321 Lucky Permutation Categories Codeforces Codeforces Beta Round #91 (Div. 1 Only) & Codeforces Beta Round #91 (Div. 2 Only) 6
322 Oh Sweet Beaverette Categories Codeforces ABBYY Cup 3.0 - Finals (online version) 6
323 Bear and Up-Down Categories Codeforces IndiaHacks 2016 - Online Edition (Div. 1 + Div. 2) 6
324 Very Interesting Game Categories Codeforces Codeforces Beta Round #88 6
325 Ants Categories Codeforces Codeforces Round #188 (Div. 1) & Codeforces Round #188 (Div. 2) 6
326 Smallest number Categories Codeforces Codeforces Beta Round #51 6
327 Vanya and Brackets Categories Codeforces Codeforces Round #308 (Div. 2) 6
328 Little Elephant and LCM Categories Codeforces Codeforces Round #157 (Div. 1) & Codeforces Round #157 (Div. 2) 6
329 FLING1 Categories SPOJ 6
330 Kingdoms Categories UVA 6
331 Harry Potter and the History of Magic Categories Codeforces Codeforces Beta Round #60 6
332 EKG Categories Codeforces ABBYY Cup 3.0 6
333 Platforms Categories Codeforces Codeforces Beta Round #18 (Div. 2 Only) 6
334 String Categories Codeforces Codeforces Beta Round #94 (Div. 1 Only) & Codeforces Beta Round #94 (Div. 2 Only) 6
335 Lizards and Basements 2 Categories Codeforces Codeforces Beta Round #6 (Div. 2 Only) 6
336 Trees Categories Codeforces Codeforces Beta Round #54 (Div. 2) 6
337 Caisa and Tree Categories Codeforces Codeforces Round #264 (Div. 2) 6
338 Lucky Probability Categories Codeforces Codeforces Beta Round #84 (Div. 1 Only) & Codeforces Beta Round #84 (Div. 2 Only) 6
339 Divisors Categories Codeforces Codeforces Round #256 (Div. 2) 6
340 Characteristics of Rectangles Categories Codeforces Codeforces Round #194 (Div. 1) 6
341 Heroes Categories Codeforces Codeforces Beta Round #69 (Div. 1 Only) & Codeforces Beta Round #69 (Div. 2 Only) 6
342 Karen and Supermarket Categories Codeforces Codeforces Round #419 (Div. 1) & Codeforces Round #419 (Div. 2) 6
343 Maximal Area Quadrilateral Categories Codeforces Codeforces Round #198 (Div. 2) 6
344 Number of Triplets Categories Codeforces Croc Champ 2012 - Round 2 (Unofficial Div. 2 Edition) 6
345 Longest Subsequence Categories Codeforces Educational Codeforces Round 9 6
346 New Year Cards Categories Codeforces Codeforces Round #100 6
347 Restoring Increasing Sequence Categories Codeforces Codeforces Round #279 (Div. 2) 6
348 Unsorting Array Categories Codeforces Codeforces Round #153 (Div. 2) 6
349 Easy Tape Programming Categories Codeforces Codeforces Round #148 (Div. 2) 6
350 A Heap of Heaps Categories Codeforces Codeforces Round #300 6
351 Summer Homework Categories Codeforces ABBYY Cup 3.0 6
352 Land Lot Categories Codeforces School Personal Contest #3 (Winter Computer School 2010/11) - Codeforces Beta Round #45 (ACM-ICPC Rules) 6
353 Sum of Medians Categories Codeforces Yandex.Algorithm 2011 Round 1 6
354 Fly, freebies, fly! Categories Codeforces Testing Round #9 6
355 Anya and Cubes Categories Codeforces Codeforces Round #297 (Div. 2) 6
356 Mr. Bender and Square Categories Codeforces Codeforces Round #156 (Div. 2) & Codeforces Round #156 (Div. 1) 6
357 Blinds Categories Codeforces School Personal Contest #1 (Winter Computer School 2010/11) - Codeforces Beta Round #38 (ACM-ICPC Rules) 6
358 Karen and Test Categories Codeforces Codeforces Round #419 (Div. 1) & Codeforces Round #419 (Div. 2) 6
359 Vladik and cards Categories Codeforces Codeforces Round #384 (Div. 2) 6
360 Rat Kwesh and Cheese Categories Codeforces Codeforces Round #341 (Div. 2) 7
361 Table with Letters - 2 Categories Codeforces Codeforces Round #154 (Div. 2) 7
362 Wrong Floyd Categories Codeforces Codeforces Round #203 (Div. 2) 7
363 Special Grid Categories Codeforces Codeforces Round #249 (Div. 2) 7
364 Kamal-ol-molk's Painting Categories Codeforces Bayan 2015 Contest Warm Up 7
365 Log Stream Analysis Categories Codeforces CROC-MBTU 2012, Elimination Round (ACM-ICPC) 7
366 Treasure Island Categories Codeforces Codeforces Beta Round #82 (Div. 2) 7
367 Brand New Easy Problem Categories Codeforces Codeforces Round #127 (Div. 2) 7
368 Vladik and chat Categories Codeforces Codeforces Round #390 (Div. 2) 7
369 Xor Categories Codeforces Codeforces Round #122 (Div. 1) & Codeforces Round #122 (Div. 2) 7
370 Spiral Maximum Categories Codeforces Croc Champ 2012 - Round 1 7
371 Bamboo Partition Categories Codeforces Codeforces Round #424 (Div. 1, rated, based on VK Cup Finals) & Codeforces Round #424 (Div. 2, rated, based on VK Cup Finals) 7
372 Elections Categories Codeforces MemSQL Start[c]UP 2.0 - Round 2 7
373 Programming Language Categories Codeforces Codeforces Round #126 (Div. 2) 7
374 Dark Assembly Categories Codeforces Codeforces Beta Round #81 7
375 Curious Array Categories Codeforces Codeforces Round #239 (Div. 1) & Codeforces Round #239 (Div. 2) 7
376 Three-dimensional Turtle Super Computer Categories Codeforces VK Cup 2016 - Qualification Round 2 7
377 Blackboard Fibonacci Categories Codeforces Codeforces Round #134 (Div. 1) & Codeforces Round #134 (Div. 2) 7
378 Subset Sums Categories Codeforces Codeforces Round #202 (Div. 1) & Codeforces Round #202 (Div. 2) 7
379 Hongcow Buys a Deck of Cards Categories Codeforces Codeforces Round #385 (Div. 1) & Codeforces Round #385 (Div. 2) 7
380 Divisor Tree Categories Codeforces Codeforces Round #196 (Div. 2) & Codeforces Round #196 (Div. 1) 7
381 Football Championship Categories Codeforces Codeforces Round #126 (Div. 2) 7
382 Journey Categories Codeforces Codeforces Beta Round #42 (Div. 2) 7
383 Fuzzy Search Categories Codeforces Codeforces Round #296 (Div. 1) 7
384 THE N WITTY FRIENDS Categories SPOJ 7
385 Help Victoria the Wise Categories Codeforces Codeforces Beta Round #78 (Div. 1 Only) & Codeforces Beta Round #78 (Div. 2 Only) 7
386 Seller Bob Categories Codeforces Codeforces Beta Round #18 (Div. 2 Only) 7
387 Edo and Magnets Categories Codeforces Codeforces Round #330 (Div. 1) & Codeforces Round #330 (Div. 2) 7
388 Anton and Permutation Categories Codeforces Codeforces Round #404 (Div. 2) 7
389 Group Photo 2 (online mirror version) Categories Codeforces VK Cup 2015 - Round 1 (unofficial online mirror, Div. 1 only) 7
390 Peterson Polyglot Categories Codeforces Codeforces Round #402 (Div. 1) & Codeforces Round #402 (Div. 2) 7
391 ucyhf Categories Codeforces April Fools Day Contest 7
392 Double Happiness Categories Codeforces Codeforces Beta Round #86 (Div. 1 Only) & Codeforces Beta Round #86 (Div. 2 Only) 7
393 Game Categories Codeforces Codeforces Beta Round #46 (Div. 2) 7
394 Beautiful IP Addresses Categories Codeforces Croc Champ 2013 - Round 1 7
395 Pairs of Numbers Categories Codeforces Codeforces Testing Round #3 7
396 Minimum Modular Categories Codeforces Codeforces Round #183 (Div. 1) & Codeforces Round #183 (Div. 2) 7
397 Binary Table Categories Codeforces CROC 2016 - Final Round [Private, For Onsite Finalists Only] 7
398 Little Victor and Set Categories Codeforces Codeforces Round #262 (Div. 2) 7
399 Magic Matrix Categories Codeforces Educational Codeforces Round 9 8
400 Distinct Paths Categories Codeforces Croc Champ 2013 - Round 2 8
401 Broken Monitor Categories Codeforces Codeforces Round #217 (Div. 2) 8
402 Crosses Categories Codeforces Codeforces Round #132 (Div. 2) 8
403 Timofey and remoduling Categories Codeforces Codeforces Round #395 (Div. 1) & Codeforces Round #395 (Div. 2) 8
404 Zoo Categories Codeforces Croc Champ 2012 - Final 8
405 Help Caretaker Categories Codeforces Codeforces Round #102 (Div. 1) & Codeforces Round #102 (Div. 2) 8
406 Beautiful Set Categories Codeforces Codeforces Round #213 (Div. 1) & Codeforces Round #213 (Div. 2) 8
407 Collisions Categories Codeforces Codeforces Beta Round #34 (Div. 2) 8
408 Cinema Categories Codeforces Codeforces Round #126 (Div. 2) 8
409 Safe cracking Categories Codeforces Codeforces Beta Round #41 8
410 Cube Problem Categories Codeforces Croc Champ 2013 - Round 2 8
411 Mad Joe Categories Codeforces CROC-MBTU 2012, Final Round (Online version, Div. 2) 8
412 Kay and Eternity Categories Codeforces Codeforces Round #359 (Div. 1) 8
413 Vanya and Balloons Categories Codeforces Codeforces Round #355 (Div. 2) 8
414 Ghd Categories Codeforces Codeforces Round #213 (Div. 1) 8
415 Chip Play Categories Codeforces Codeforces Beta Round #74 (Div. 1 Only) & Codeforces Beta Round #74 (Div. 2 Only) 8
416 Mother of Dragons Categories Codeforces Codeforces Round #428 (Div. 2) 8
417 Dividing Kingdom II Categories Codeforces Codeforces Round #360 (Div. 1) 8
418 Safe Categories Codeforces Codeforces Beta Round #44 (Div. 2) 8
419 Suggested Friends Categories Codeforces CROC-MBTU 2012, Elimination Round (ACM-ICPC) 8
420 Gosha is hunting Categories Codeforces Codeforces Round #381 (Div. 1) 8
421 Sereja and Tree Categories Codeforces Codeforces Round #223 (Div. 1) & Codeforces Round #223 (Div. 2) 8
422 Mushroom Strife Categories Codeforces Codeforces Beta Round #56 8
423 The Diameter of Tree Categories Live Archive 2014 Asia - Xian 8
424 Summer Earnings Categories Codeforces Codeforces Round #194 (Div. 1) 8
425 Dima and Magic Guitar Categories Codeforces Codeforces Round #214 (Div. 2) 8
426 Polycarpus the Safecracker Categories Codeforces VK Cup 2012 Round 1 8
427 Biathlon Track Categories Codeforces Codeforces Round #242 (Div. 2) 8
428 Solitaire Categories Codeforces Codeforces Beta Round #65 (Div. 2) 9
429 Physical Education and Buns Categories Codeforces Codeforces Round #231 (Div. 2) 9
430 Fetch the Treasure Categories Codeforces Codeforces Round #185 (Div. 1) & Codeforces Round #185 (Div. 2) 9
431 Maxim and Calculator Categories Codeforces Codeforces Round #160 (Div. 1) 9
432 Race Categories Codeforces Bayan 2012-2013 Elimination Round (ACM ICPC Rules, English statements) 9
433 Rectangles and Square Categories Codeforces MemSQL start[c]up Round 2 - online version 9
434 Dasha and cyclic table Categories Codeforces Codeforces Round #390 (Div. 2) 9
435 Writing a Song Categories Codeforces Codeforces Beta Round #50 9
436 Bear and Chase Categories Codeforces Codeforces Round #356 (Div. 1) 9
437 Large Refrigerator Categories Codeforces VK Cup 2012 Round 2 9
438 Roland and Rose Categories Codeforces Codeforces Round #262 (Div. 2) 9
439 The Last Hole! Categories Codeforces Codeforces Round #168 (Div. 1) & Codeforces Round #168 (Div. 2) 9
440 Prime Segment Categories Codeforces Unknown Language Round #1 9
441 BLOCK_D SOLVER Categories SPOJ 9
442 Domino Categories Codeforces Yandex.Algorithm 2011 Finals 9
443 Task processing Categories Codeforces 2015-2016 ACM-ICPC, NEERC, Southern Subregional Contest (Online Mirror, ACM-ICPC Rules, Teams Preferred) 9
444 Rhombus Categories Codeforces Codeforces Round #161 (Div. 2) 9
445 Sign Posts Categories Codeforces Codeforces Round #315 (Div. 1) 9
446 Travelling Through the Snow Queen's Kingdom Categories Codeforces Codeforces Round #359 (Div. 1) 9
447 Cycle Categories Codeforces Codeforces Beta Round #97 (Div. 1) 9
448 Minimum Diameter Categories Codeforces VK Cup 2012 Round 3 9
449 Word Folding Categories Codeforces Rockethon 2014 9
450 Dima and Kicks Categories Codeforces Codeforces Round #208 (Div. 2) 9
451 Lucky Tickets Categories Codeforces Codeforces Round #194 (Div. 1) & Codeforces Round #194 (Div. 2) 9
452 Fibonacci Number Categories Codeforces Codeforces Round #122 (Div. 1) 9
453 Rats Categories Codeforces Codeforces Round #155 (Div. 2) 9
454 Item World Categories Codeforces Codeforces Beta Round #81 9
455 The Tournament Categories Codeforces Rockethon 2014 9
456 Shaass and Painter Robot Categories Codeforces Codeforces Round #178 (Div. 2) 9
457 Bitonix' Patrol Categories Codeforces Codeforces Round #134 (Div. 1) 9
458 Walls Categories Live Archive 2012 North America - Southeast USA 9
459 Harry Potter and the Sorting Hat Categories Codeforces Codeforces Beta Round #60 9
460 Plane of Tanks: Duel Categories Codeforces Codeforces Round #115 9
461 PE Lesson Categories Codeforces ABBYY Cup 3.0 9
462 Pasha and Pipe Categories Codeforces Codeforces Round #293 (Div. 2) 9
463 Brand New Problem Categories Codeforces Codeforces Round #127 (Div. 1) 9
464 Azembler Categories Codeforces Codeforces Beta Round #76 (Div. 1 Only) & Codeforces Beta Round #76 (Div. 2 Only) 9
465 Synchrophasotron Categories Codeforces Codeforces Beta Round #62 9
466 Supercollider Categories Codeforces Rockethon 2014 9
467 Race Categories Codeforces Codeforces Beta Round #42 (Div. 2) 9
468 Dividing Kingdom Categories Codeforces Codeforces Round #158 (Div. 2) 9
469 Power Defence Categories Codeforces Codeforces Round #115 9
470 Frames Categories Codeforces Codeforces Round #108 (Div. 2) 9
471 Gripping Story Categories Codeforces Codeforces Round #125 (Div. 1) 9
472 Ever-Hungry Krakozyabra Categories Codeforces Codeforces Round #426 (Div. 1) & Codeforces Round #426 (Div. 2) 9
473 Savior Categories Codeforces Codeforces Beta Round #56 9
474 Pumping Stations Categories Codeforces Codeforces Round #200 (Div. 1) 9
475 Toys Categories Codeforces School Team Contest #2 (Winter Computer School 2010/11) 10
476 Two Circles Categories Codeforces Codeforces Round #211 (Div. 2) 10
477 Long sequence Categories Codeforces Yandex.Algorithm 2011 Round 2 10
478 To Hack or not to Hack Categories Codeforces CROC 2016 - Final Round [Private, For Onsite Finalists Only] 10
479 Mrs. Hudson's Pancakes Categories Codeforces Codeforces Round #110 (Div. 1) 10
480 Ali goes shopping Categories Codeforces Unknown Language Round #2 10
481 Pills Categories Codeforces Codeforces Beta Round #93 (Div. 1 Only) 10
482 The Overdosing Ubiquity Categories Codeforces Codeforces Round #439 (Div. 2) 10
483 Banners Categories Codeforces Zepto Code Rush 2014 10
484 Wavy numbers Categories Codeforces Codeforces Round #273 (Div. 2) 10
485 Robot in Basement Categories Codeforces Yandex.Algorithm 2011 Finals 10
486 Plane of Tanks Categories Codeforces Codeforces Beta Round #66 10
487 Entertaining Geodetics Categories Codeforces Codeforces Beta Round #81 10
488 Hellish Constraints Categories Codeforces Codeforces Beta Round #99 (Div. 1) 10
489 Party Categories Codeforces Bubble Cup 8 - Finals [Online Mirror] 10
490 Lift and Throw Categories Codeforces Codeforces Beta Round #81 10
491 Chain Reaction Categories Codeforces Codeforces Round #349 (Div. 1) & Codeforces Round #349 (Div. 2) 10
492 Tennis Rackets Categories Codeforces Croc Champ 2013 - Finals (online version, Div. 1) 10
493 Lucky Interval Categories Codeforces Codeforces Beta Round #84 (Div. 1 Only) 10
494 Gears Categories Codeforces Codeforces Round #283 (Div. 1) 10