版权声明:本文为博主原创文章,未经博主同意不得转载. https://blog.csdn.net/y990041769/article/details/37935237 题目:codeforces 448CPainting Fence 题意:n个1* a [ i ] 的木板.把他们立起来,变成每一个木板宽为1长为 a [ i ] 的栅栏.如今要给栅栏刷漆.刷子宽1,每一刷子能够刷随意长,如今让你求最少须要多少刷子? 分析:题目看似没有头绪.细致分析的话事实上非常简单 首先,我们假如每次都刷一个木…

Fence Time Limit: 1000ms Memory Limit: 262144KB This problem will be judged on CodeForces. Original ID: 363B64-bit integer IO format: %I64d      Java class name: (Any) There is a fence in front of Polycarpus's home. The fence consists of n planks of…

题目链接:http://codeforces.com/problemset/problem/363/B 题目意思:给定整数n和k,需要从n个数中找出连续的k个数之和最小,输出这连续的k个数中的第一个数的下标. 直接暴力果断TLE,于是想到之前做的那条332B - Maximum Absurdity DP题的做法,决定开多一个额外的数组b[],在输入的时候把a[i]中前i个数的和都记录到b[i]中,这样通过b[i] - b[i-k]即可得出序列h1, h2, ..., hn (1 ≤ hi ≤ 1…

John Doe has a crooked fence, consisting of n rectangular planks, lined up from the left to the right: the plank that goes i-th (1 ≤ i ≤ n)(from left to right) has width 1 and height hi. We will assume that the plank that goes i-th (1 ≤ i ≤ n) (from…

Fence Divercity 我们设a[ i ] 为第 i 个围栏被切的最靠下的位置, 我们发现a[ i ] 的最大取值有一下信息: 如果从i - 1过来并在 i  结束a[ i ] = min(h[ i - 1], h[ i ]) 如果从i - 1过来并延续到i + 1,   a[ i ] = min(h[ i - 1 ], h[ i ], h[ i + 1 ]) 如果从 i 开始 i 结束 a[ i ] = h[ i ] 如果从 i 开始并延续到 i + 1,   a[ i ] = min…

1.codeforces 349B    Color the Fence 2.链接:http://codeforces.com/problemset/problem/349/B 3.总结: 刷栅栏.1-9每个字母分别要ai升油漆,问最多可画多大的数字. 贪心,也有点考思维. #include<bits/stdc++.h> using namespace std; #define LL long long #define INF 0x3f3f3f3f int main() { ]; while(…

题目链接:Codeforces 484E Sign on Fence 题目大意:给定给一个序列,每一个位置有一个值,表示高度,如今有若干查询,每次查询l,r,w,表示在区间l,r中, 连续最长长度大于w的最大高度为多少. 解题思路:可持久化线段树维护区间合并,前端时间碰到一题可持久化字典树,就去查了一下相关论文,大概知道了是 什么东西. 将高度依照从大到小的顺序排序,然后每次插入一个位置,线段树维护最长连续区间,由于插入是依照从大到小的顺 序,所以每次的线段树中的连续最大长度都是满足高度大于等于…

http://codeforces.com/contest/484/problem/E 题意: 给出n个数,查询最大的在区间[l,r]内,长为w的子区间的最小值 第i棵线段树表示>=i的数 维护最长连续子区间 把数从大到小插入主席树 对于每个询问,二分x 在第x棵线段树中查,若最长连续子区间>=w,到代表更大的线段树中查 没有建第n+1棵线段树,导致前面节点的siz不对,WA了一次 #include<cstdio> #include<iostream> #include…

A. Vanya and Fence 题目连接: http://www.codeforces.com/contest/677/problem/A Description Vanya and his friends are walking along the fence of height h and they do not want the guard to notice them. In order to achieve this the height of each of the frien…

G. Fence Divercity 题目连接: http://www.codeforces.com/contest/659/problem/G Description Long ago, Vasily built a good fence at his country house. Vasily calls a fence good, if it is a series of n consecutively fastened vertical boards of centimeter widt…