zoj 2250 Grandpa is Famous

#include <iostream>#include <cstdlib>#include <cstring>#include <stdio.h>using namespace std;int V[ 10005 ];int C[ 10005 ];int cmp( const void* a, const void* b ){    return *(int *)b - *(int *)a;}int main(){    int N,M,I;    while ( cin >> N >> M && (N||M) ) {        memset( V, 0, sizeof( V ) );        memset( C, 0, sizeof( C ) );        for ( int i = 1 ; i <= N ; ++ i ) { for ( int j = 1 ; j <= M ; ++ j ) {     scanf("%d",&I);     ++ C[ I ];     ++ V[ I ]; }        }        qsort( C, 10001, sizeof( int ), cmp );        int v = 0;        for ( int i = 1 ; ; ++ i ) { if ( C[ i ] != C[ i-1 ] ) {     v = C[ i ];     break; }        }        if ( !v ) continue;        for ( int i = 1 ; i <= 10000 ; ++ i ) { if ( V[ i ] == v ) {     printf("%d ",i); }        }        printf("n");    }    return 0;}