Codeforces Round 413 Division 2

05-12

Codeforces Round 411 Division 2

05-07

ITSA 2016 桂冠賽 挑戰組 第五題

05-03

Codeforces Round 410 Div2 Problem C

04-27

POJ3104

03-24

Codeforces Round 284 Div2 Problem C

01-17

Codeforces Round 368 Div2 Problem C

08-21

Codeforces Educational Round 9 Problem D

08-19

UVa 11300

08-09

Codeforces Round 364 Div2 Problem D

08-04