http://poj.org/problem?id=2395 /* @author: */ import java.util.Scanner; public class Main{ public static void main(String args[]) { int p[][]=new int[2001][2001]; int n,m,i,j,k; int dis[]=new int[2001]; int u,v,l; int ne[]=new int[2001]; Scanner sc=new Scanner(System.in); n=sc.nextInt(); m=sc.nextInt(); int max=0; for(i=0;i< n;i++) for(j=0;j< n;j++) p[i][j]=1000000001; for(i=0;i< m;i++) { u=sc.nextInt(); v=sc.nextInt(); l=sc.nextInt(); u--; v--; if(p[u][v]>l)p[u][v]=p[v][u]=l; } for(i=0;i< n;i++) { dis[i]=p[0][i]; ne[i]=0; } ne[0]=-1; for(i=0;i< n-1;i++) { int min=1000000001,tag=-1; for(j=0;j< n;j++) if(ne[j]!=-1&&dis[j]< min) { min=dis[j]; tag=j; } ne[tag]=-1; if(dis[tag]>max)max=dis[tag]; for(j=0;j< n;j++) if(ne[j]!=-1&&p[tag][j]< dis[j]) { dis[j]=p[tag][j]; ne[j]=tag; } } System.out.printf("%d",max); } }
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