bzoj 3872: [Poi2014]Ant colony — 树形dp+二分
3872: [Poi2014]Ant colony Time Limit: 30 Sec Memory Limit: 128 MB Description There is an entrance to the ant hi...
二分
bzoj 1650: [Usaco2006 Dec]River Hopscotch 跳石子
1650: [Usaco2006 Dec]River Hopscotch 跳石子 Time Limit: 5 Sec Memory Limit: 64 MB Description Every year the cows hold an ...
衫小寨 出品