摘要：
1017 - Exact cover Time Limit: 15s Memory Limit: 128MB Special Judge Submissions: 6751 Solved: 3519 Time Limit: 15s Memory Limit: 128MB Special Judge 阅读全文
摘要：
Problem A Chess Queen Input: Standard Input Output: Standard Output You probably know how the game of chess is played and how chess queen operates. Tw 阅读全文