结构体写的

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
ll n;
string s;
struct aa
{
    string a;
    ll b;
}c[200];
string aaa(string s)
{
    for(int i=0;i<s.size();i++)
        if(s[i]>='A'&&s[i]<='Z')
            s[i]+=32;
    return s;
}
bool cmp(aa x,aa y)
{
    return x.b>y.b;
}
int main()
{
    cin>>n;
    for(int i =1;i<=n;i++)
    {
        cin>>s;
        c[i].a=aaa(s);
        c[i].b++;
    }
    sort(c+1,c+n+1,cmp);
    cout<<c[1].a;






    return 0;
}