nyist 277 车牌号

#include<iostream>
#include<cstring>
#include<algorithm>
using namespace std;
typedef struct char_c
{
    char ch[6];
}char_c;
int fun(char_c a,char_c b)
{
    int i;
    for(i=0;i<5;i++)
    {
      if(a.ch[i]>b.ch[i]){return 1;break;}
      if(a.ch[i]<b.ch[i]) {return 0;break;}
    }
}

int main()
{
    int n;
    const int N=1001;
    char_c ch1[N];
    cin>>n;
    while(n--)
      {
          int m;
          cin>>m;
          int i;
          for( i = 0; i < m; i++ )
             cin>>ch1[i].ch;
         sort(ch1,ch1+m,fun);
         // for( i = 0; i < m; i++ )
            cout<<ch1[m-1].ch<<endl;
        }
  return 0;
}