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Meet in The Middle problems
Problem Name Online Judge Year Contest Difficulty Level
1 ABCDEF Categories SPOJ 1
2 4 values whose sum is 0 Categories SPOJ 1
3 Subset Sums Categories SPOJ 1
4 4 Values whose Sum is 0 Categories Live Archive 2005 Europe - Southwestern 1
5 4 Values whose Sum is 0 Categories TJU 1
6 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
7 Robbing Gringotts Categories Live Archive 2011 Asia - Amritapuri 2
8 Solitaire Categories SPOJ 2
9 The Morning after Halloween Categories Live Archive 2007 Asia - Tokyo 3
10 Vanya and Scales Categories Codeforces Codeforces Round #308 (Div. 2) 3
11 Face the mate Categories SPOJ 4
12 Maximum Subsequence Categories Codeforces Educational Codeforces Round 32 5
13 Chocolate Categories Codeforces Codeforces Round #279 (Div. 2) 5
14 Parity Categories SPOJ 5
15 Inversions problem Categories Codeforces Rockethon 2015 5
16 Golden System Categories Codeforces MemSQL Start[c]UP 2.0 - Round 2 6
17 Anya and Cubes Categories Codeforces Codeforces Round #297 (Div. 2) 6
18 Permutation Sum Categories Codeforces Codeforces Round #175 (Div. 2) 6
19 Maximal Independent Set Categories SPOJ 6
20 Lizard Era: Beginning Categories Codeforces Codeforces Round #325 (Div. 1) & Codeforces Round #325 (Div. 2) 7
21 Axis Walking Categories Codeforces Codeforces Round #191 (Div. 2) 7
22 EllysBulls Categories TopCoder SRM 572 - Div1 medium] (15492) 7
23 Event Dates Categories Codeforces School Team Contest #3 (Winter Computer School 2010/11) 7
24 Mother of Dragons Categories Codeforces Codeforces Round #428 (Div. 2) 8
25 The Morning after Halloween Categories TJU 8
26 Missing Piece 2001 Categories TJU 9
27 Simplified Nonogram Categories Codeforces Codeforces Round #298 (Div. 2) 9
28 Permanent Categories Codeforces Codeforces Round #268 (Div. 1) 10
29 Wavy numbers Categories Codeforces Codeforces Round #273 (Div. 2) 10