
Problem Name 
Online Judge 
Year 
Contest 
Difficulty Level 
1 
A Bug’s Life 
SPOJ 


1 
2 
Piece it together 
Live Archive 
2011 
Europe  Northwestern 
2 
3 
Idol 
Live Archive 
2012 
Europe  Northwestern 
3 
4 
Manhattan 
UVA 


3 
5 
Wedding 
UVA 


4 
6 
Two Sets 
Codeforces 

Codeforces Round #268 (Div. 1) & Codeforces Round #268 (Div. 2) 
4 
7 
TORNJEVI 
SPOJ 


4 
8 
The Door Problem 
Codeforces 

ICM Technex 2017 and Codeforces Round #400 (Div. 1 + Div. 2, combined) 
4 
9 
Cardápio da Sra Montagny 
SPOJ Brazil 


5 
10 
Cutting Figure 
Codeforces 

Codeforces Round #122 (Div. 1) & Codeforces Round #122 (Div. 2) 
5 
11 
The Ministers' Major Mess 
UVA 


6 
12 
The Road to Berland is Paved With Good Intentions 
Codeforces 

Codeforces Round #141 (Div. 2) 
6 
13 
Ring Road 2 
Codeforces 

Codeforces Beta Round #27 (Codeforces format, Div. 2) 
6 
14 
Football and Lie 
Timus 


7 
15 
Rectangles 
UVA 


7 
16 
Game with Cards 
Timus 


7 
17 
New Language 
Codeforces 

Codeforces Round #315 (Div. 1) & Codeforces Round #315 (Div. 2) 
8 
18 
Palindromic DNA 
UVA 


9 
19 
Duff in Mafia 
Codeforces 

Codeforces Round #326 (Div. 1) & Codeforces Round #326 (Div. 2) 
10 
20 
Summer Dichotomy 
Codeforces 

Codeforces Round #300 
10 
21 
Supplying the Suppliers 
SPOJ 


10 