2017年10月25日
Travel Cards CodeForces - 847K
摘要： In the evening Polycarp decided to analyze his today's travel expenses on public transport. The bus system in the capital of Berland is arranged in su 阅读全文
posted @ 2017-10-25 23:31 天之道，利而不害 阅读(493) 评论(2) 推荐(0) 编辑