http://poj.org/problem?id=2485 import java.util.Scanner; public class Main{ public static void main(String argvs[]){ int matrix[][]; int Max=65536; int m,n,t,i,j,k,max_len,count,num,min,point=0; int temp1[],temp2[],flag[]; Scanner in=new Scanner(System.in); t=in.nextInt(); for(i=0;i< t;i++){ n=in.nextInt(); matrix=new int[n][n]; flag=new int[n]; for(j=0;j< n;j++) flag[j]=0; flag[0]=1; count=0; num=0; min=Max; max_len=0; temp1=new int[n*(n-1)/2]; temp2=new int[n*(n-1)/2]; for(j=0;j< n;j++) for(k=0;k< n;k++) matrix[j][k]=in.nextInt(); for(j=1;j< n;j++){ temp1[num]=matrix[0][j]; temp2[num]=j; num++; } while(count!=n-1){ for(j=0;j< num;j++) if(min>temp1[j]&&flag[temp2[j]]==0){ min=temp1[j]; point=j; } if(min>max_len) max_len=min; flag[temp2[point]]=1; for(j=0;j< n;j++) if(j!=temp2[point]&&flag[j]==0){ temp1[num]=matrix[temp2[point]][j]; temp2[num]=j; num++; } min=Max; count++; } System.out.println(max_len); } } }
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