摘要: [Educational Codeforces Round 86 (Rated for Div. 2)] E. Placing Rooks (组合数学,容斥定律) E. Placing Rooks time limit per test 2 seconds memory limit per test 阅读全文
posted @ 2020-04-29 22:57 茄子Min 阅读(430) 评论(0) 推荐(0)