摘要：
[USACO09DEC]音符Music Notes （二分、STL） https://www.luogu.org/problem/P2969 题目描述 FJ is going to teach his cows how to play a song. The song consists of N ( 阅读全文
摘要：
[USACO09DEC]雪橇Bobsledding（贪心） https://www.luogu.org/problem/P2968 题目描述 Bessie has entered a bobsled competition because she hopes her hefty weight wil 阅读全文