hdu 5364 Distribution money

#include<stdio.h>
#include<string.h>
#include<string>
#include<stack>
#include<algorithm>
using namespace std;

struct node
{
    int num;
    int cnt;
}a[10000+5];

bool cmp(node n1,node n2)
{
    return n1.cnt>n2.cnt;
}
int main()
{
    int n,i,t;
    while(~scanf("%d",&n))
    {
        for(i=0;i<=10000;i++)
        {
            a[i].num=i;
            a[i].cnt=0;
        }
        for(i=0;i<n;i++)
        {
            scanf("%d",&t);
            a[t].cnt++;
        }
        sort(a,a+10005,cmp);
        if(2*a[0].cnt>n) printf("%d\n",a[0].num);
        else
            printf("-1\n");
    }
    return 0;
}