1 
P1  Valhalla Siege 
Codeforces 
Codeforces Round #478 (Div. 2) 
2 
P2  Generate a String 
Codeforces 
Educational Codeforces Round 16 
3 
P3  Devu and his Brother 
Codeforces 
Codeforces Round #251 (Div. 2) 
4 
P4  The Monster and the Squirrel 
Codeforces 
Codeforces Round #328 (Div. 2) 
5 
P5  Commentary Boxes 
Codeforces 
Educational Codeforces Round 45 (Rated for Div. 2) 
6 
P6  Watermelon 
Codeforces 
Codeforces Beta Round #4 (Div. 2 Only) 
7 
P7  Brick Game 
UVA 

8 
P8  Perfection 
UVA 

9 
P9  Digit Counting 
UVA 

10 
P10  Ant on a Chessboard 
UVA 

11 
P11  Count on Cantor 
UVA 

12 
P12  Jolly Jumpers 
UVA 

13 
P13  Newspaper 
UVA 
