URAL 1525 Path

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#include<stdio.h> #include<string.h> #include<math.h> #include<algorithm> using namespace std; + ; char s[maxn]; int main() { long long int n, m, k; while (~scanf("%lld%lld%lld", &n, &m, &k)) { scanf("%s&…

ural 1143. Electric Path

1143. Electric Path Time limit: 1.0 secondMemory limit: 64 MB Background At the team competition of the 10th national student informatics Olympic, which is organized at Hanoi National University, there are N teams participating. Each team is assigned…

ural 1143. Electric Path(凸包上最短哈密顿路径)

题目链接:http://acm.timus.ru/problem.aspx?space=1&num=1143 题意:逆时针给一个凸包的n(n<=200)个顶点坐标,求一个最短哈密顿路径的长度. 解法:求最短哈密顿本身是一个NP问题,可是由于是凸包上,能够利用这个做:有一个性质:凸包上的最短哈密顿路径不会出现交叉.所以能够看出来从一点出发,他要么和顺时针相邻点连接,要么和逆时针相邻点相连接.通过这个性质能够通过dp做: ans[i][j][0]表示i開始.往后j的点最短路径长度,ans[i][…

URAL 1932 The Secret of Identifier 题解

http://acm.timus.ru/problem.aspx?space=1&num=1932 B - The Secret of Identifier Time Limit:1000MS Memory Limit:65536KB 64bit IO Format:%I64d & %I64u Submit Status Practice URAL Description Davy Jones: You've been captain of the Black Pearl for 13 y…

URAL(DP集）

这几天扫了一下URAL上面简单的DP 第一题简单递推 1225. Flags #include <iostream> #include<cstdio> #include<cstring> #include<algorithm> using namespace std; #define LL long long LL dp[][]; int main() { int i,n; scanf("%d",&n); dp[][] = ;d…

URAL 1934 spfa算法

D - Black Spot Time Limit:1000MS Memory Limit:65536KB 64bit IO Format:%I64d & %I64u Submit Status Practice URAL 1934 Description Bootstrap: Jones's terrible leviathan will find you and drag the Pearl back to the depths and you along with it.…

NodeJs之Path

Path模块 NodeJs提供的Path模块,使得我们可以对文件路径进行简单的操作. API var path = require('path'); var path_str = '\\Users\\Administrator\\Desktop\\event.js'; console.log('文件名带后缀:',path.basename(path_str)); console.log('文件名不带后缀:',path.basename(path_str, '.html')); console.l…