Poj 2092 Grandpa is Famous(基数排序)

题目链接：http://poj.org/problem?id=2092

思路分析：先统计数据，在根据Count降序排序，Count相等时按照Num升序排序；再输出Count第二大的所有Num；

 

代码如下：

#include <iostream>
#include <string.h>
#include <algorithm>

using namespace std;

#define MAX_N ( 10000 + 20 )
struct Player
{
    int Num;
    int Count;
};
bool Cmp( Player a, Player b );

int main()
{
    int n, m;
    Player P[MAX_N];

    while( scanf("%d %d", &n, &m) )
    {
        int Tmp, i, j;

        memset( P, 0, sizeof(P) );

        if ( m == 0 && n == 0 )
            break;

        for ( i = 0; i < n; ++i )
            for( j = 0; j < m; ++j )
            {
                scanf( "%d", &Tmp );
                P[Tmp].Num = Tmp;
                P[Tmp].Count++;
            }

        sort( P, P + 10010, Cmp );

        i = 1;
        while( P[i].Count == P[i+1].Count )
        {
            printf("%d ", P[i].Num );
            i++;
        }
        printf( "%d\n", P[i].Num );
    }

    return 0;
}

bool Cmp( Player a, Player b )
{
    if ( a.Count == b.Count )
        return a.Num < b.Num;
    else
        return a.Count > b.Count;
}