poj 1258 Agri-Net MST

  和2421基本上一模一样……

/*
author:jxy
lang:C/C++
university:China,Xidian University
**If you need to reprint,please indicate the source**
*/
#include <iostream>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <cmath>
#define INF 1E9
using namespace std;
int d[101][101];
int vis[101];
int dis[101];
int K;
int main()
{
    int n,m;
    while(~scanf("%d",&n)&&n)
    {
        memset(vis,0,sizeof(vis));
        memset(dis,127,sizeof(dis));
        int i,j,a,b;
        K=1;
        for(i=0;i<n;i++)
         for(j=0;j<n;j++)
          scanf("%d",&d[i][j]);
        int ans=0,Min,t;
        int now=0;
        for(i=0;i<n;i++)
        {
            Min=INF;
            for(j=0;j<n;j++)
            {
                if(dis[j]>=Min||vis[j])continue;
                Min=dis[j];now=j;
            }
            vis[now]=1;
            if(now)ans+=Min;
            for(j=0;j<n;j++)
            {
                if(vis[j])continue;
                dis[j]=min(dis[j],d[now][j]);
            }
        }
        printf("%d\n",ans);
    }
}