poj 2253(kruskal)】的更多相关文章

Frogger Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 34968   Accepted: 11235 Description Freddy Frog is sitting on a stone in the middle of a lake. Suddenly he notices Fiona Frog who is sitting on another stone. He plans to visit her,…
题目传送门 /* 最短路:Floyd算法模板题 */ #include <cstdio> #include <iostream> #include <algorithm> #include <cmath> #include <cstring> #include <string> #include <vector> using namespace std; + ; const int INF = 0x3f3f3f3f; do…
链接:poj 2253 题意:给出青蛙A,B和若干石头的坐标,现青蛙A想到青蛙B那,A可通过随意石头到达B, 问从A到B多条路径中的最长边中的最短距离 分析:这题是最短路的变形,曾经求的是路径总长的最小值,而此题是通路中最长边的最小值,每条边的权值能够通过坐标算出,由于是单源起点,直接用SPFA算法或dijkstra算法就能够了 SPFA 16MS #include<cstdio> #include<queue> #include<cmath> #include<…
POJ 2253 Frogger题目意思就是求所有路径中最大路径中的最小值. #include<iostream> #include<cstdio> #include<string.h> #include <utility>//make_pair的头文件 #include<math.h> using namespace std; ; double map[maxn][maxn]; int n; typedef struct pair<int…
POJ. 2253 Frogger (Dijkstra ) 题意分析 首先给出n个点的坐标,其中第一个点的坐标为青蛙1的坐标,第二个点的坐标为青蛙2的坐标.给出的n个点,两两双向互通,求出由1到2可行通路的所有步骤当中,步长最大值. 在dij原算法的基础上稍作改动即可.dij求解的是单源最短路,现在求解的是步长最大值,那么更新原则就是,当前的这一步比保存的步如果要大的话,就更新,否则就不更新. 如此求解出来的就是单源最大步骤. 代码总览 #include <cstdio> #include &…
Frogger Time Limit:1000MS     Memory Limit:65536KB     64bit IO Format:%I64d & %I64u Submit Status Practice POJ 2253 Description Freddy Frog is sitting on a stone in the middle of a lake. Suddenly he notices Fiona Frog who is sitting on another stone…
POJ 2253 Frogger Freddy Frog is sitting on a stone in the middle of a lake. Suddenly he notices Fiona Frog who is sitting on another stone. He plans to visit her, but since the water is dirty and full of tourists' sunscreen, he wants to avoid swimmin…
Frogger Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 30427   Accepted: 9806 Description Freddy Frog is sitting on a stone in the middle of a lake. Suddenly he notices Fiona Frog who is sitting on another stone. He plans to visit her,…
题目链接:http://poj.org/problem?id=2253 题意: 给出两只青蛙的坐标A.B,和其他的n-2个坐标,任一两个坐标点间都是双向连通的.显然从A到B存在至少一条的通路,每一条通路的元素都是这条通路中前后两个点的距离,这些距离中又有一个最大距离. 现在要求求出所有通路的最大距离,并把这些最大距离作比较,把最小的一个最大距离作为青蛙的最小跳远距离. 思路: j从1,2,两条路中选取较小者,而1这条路,是s—>k—>j的最大步伐. #include <stdio.h&g…
http://poj.org/problem?id=2253 #include <iostream> #include <queue> #include <cmath> #include <iomanip> using namespace std; queue <int > que; int co[202][2]; double d[202][202],u[202][202]; int n; int main(){ ios::sync_with_…