NC24623 Tree Decoration】的更多相关文章

P3018 [USACO11MAR]树装饰Tree Decoration 比较水的一道树上模拟水题,更新每个点的价值为以这个点为根的子树中的价值最小值,同时更新以每个节点为根的$sum$值,即以这个节点为根的子树的礼物数, 如果$sum$值小于自身所规定数,就用最小值来计算剩余价值. #include<iostream> #include<cstdio> #include<algorithm> #define N 1000000 #define inf 0x7fffff…
洛谷P3018 [USACO11MAR]树装饰Tree Decoration树形DP 因为要求最小,我们就贪心地用每个子树中的最小cost来支付就行了 #include <bits/stdc++.h> #define For(i, j, k) for(int i=j; i<=k; i++) #define Dow(i, j, k) for(int i=j; i>=k; i--) #define LL long long using namespace std; inline int…
bzoj 2197: [Usaco2011 Mar]Tree Decoration 树形dp..f[i]表示处理完以i为根的子树的最小时间. 因为一个点上可以挂无数个,所以在点i上挂东西的单位花费就是i所在子树里的最小单位花费.. 所以每次求f[i]只要使子树里的数量都满足要求就好了..i的祖先还要更多的话随时可以选某个节点多挂一些.. f[i]=sum{f[j]}+mincost[i]*max(need[i]-sum{need[j]},0)..(j是i的儿子,mincost[i]表示子树i里的…
bzoj上的usaco题目还是很好的(我被虐的很惨. 有必要总结整理一下. 1592: [Usaco2008 Feb]Making the Grade 路面修整 一开始没有想到离散化.然后离散化之后就很好做了.F[I,j]表示第i个点,高度>=j或<=j,f[I,j]=min(f[i-1,j]+abs(b[j]-a[i]),f[I,j-1]) 1593: [Usaco2008 Feb]Hotel 旅馆 线段树 ★1594: [Usaco2008 Jan]猜数游戏 二分答案然后写线段树维护 15…
听说KPM初二暑假就补完了啊%%% 先刷Gold再刷Silver(因为目测没那么多时间刷Silver,方便以后TJ2333(雾 按AC数降序刷 ------------------------------------------------------------------------------------------------------- bzoj1597: [Usaco2008 Mar]土地购买  斜率优化DP h升序,w降序. f[i]=min(f[j]+h[i]*w[j+1])…
Search GO 说明:输入题号直接进入相应题目,如需搜索含数字的题目,请在关键词前加单引号 Problem ID Title Source AC Submit Y 1000 A+B Problem 10983 18765 Y 1036 [ZJOI2008]树的统计Count 5293 13132 Y 1588 [HNOI2002]营业额统计 5056 13607 1001 [BeiJing2006]狼抓兔子 4526 18386 Y 2002 [Hnoi2010]Bounce 弹飞绵羊 43…
题目链接 http://acm.split.hdu.edu.cn/showproblem.php?pid=5379 Problem Description Little sun is an artist. Today he is playing mahjong alone. He suddenly feels that the tree in the yard doesn't look good. So he wants to decorate the tree.(The tree has n…
HDU  5379 Problem Description Little sun is an artist. Today he is playing mahjong alone. He suddenly feels that the tree in the yard doesn't look good. So he wants to decorate the tree.(The tree has n vertexs, indexed from 1 to n.)Thought for a long…
题目链接:pid=5379">http://acm.hdu.edu.cn/showproblem.php? pid=5379 Problem Description Little sun is an artist. Today he is playing mahjong alone. He suddenly feels that the tree in the yard doesn't look good. So he wants to decorate the tree.(The tre…
Mahjong tree Time Limit: 6000/3000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 768    Accepted Submission(s): 241 Problem Description Little sun is an artist. Today he is playing mahjong alone. He suddenly feels…