#include <iostream>
#include <string>
using namespace std;
#define FOR(i,a,b) for(int i=(a);i<(b);++i)
#define RANGE(i,a) for(int i=0;i<(a);++i)
#define SWAP(a,b) auto c=a;a=b;b=c;


int main()
{
    int n;
    string colors[1001], color;
    int amount[1001], color_amount;

    cin >> n;
    while (n != 0){
        color_amount = 0;
        FOR(i,0,n){
            cin >> color;
            bool found = false;
            RANGE(j, color_amount){
                if (colors[j] == color){
                    amount[j] += 1;
                    found = true;
                }
            }
            if(!found){
                colors[color_amount] = color;
                amount[color_amount] = 1;
                color_amount ++;
            }
        }
        int max = 0, max_index = 0;
        RANGE(i, color_amount){
            if(amount[i] > max){
                max_index = i;
                max = amount[i];
            }
        }
        cout << colors[max_index] << endl;
        cin >> n;
    }
    return 0;
}

很简单的题目，用 string 可以避免使用 strcmp 时的麻烦。