letlifestop:
博客地址:https://www.cnblogs.com/letlifesto
letlifestop:
博客地址:https://www.cnblogs.com/letlifesto
实现 reverse(const char *s1 , char *s2)
D - The Lucky Week ZOJ - 3939 (思维)
A - Piece of Cake Kattis - pieceofcake (数学)
Subsequences in Substrings Kattis - subsequencesinsubstrings (暴力)