hdu 5123 who is the best?

找出出现频率最高的数.

#include<iostream>using namespace std;int a[100+5];int main(){int t;cin>>t;while(t--){memset(a,0,sizeof(a));int n;cin>>n;while(n--){int x;cin>>x;a[x]++;}int i,sum=0,re=0;for(i=1;i<100+5;i++){if(a[i]>sum){re=i;sum=a[i];}}cout<<re<<endl;}return 0;}