백준 1159

백준 1159

#include<iostream>
#include<vector>
#include<string>
using namespace std;
int main()
{
	vector<int> v1(26,0);
	int n;
	cin >> n;
	char name[30];
	for (int i = 0; i < n; i++)
	{
		cin >> name;		
		char ele = name[0];
		int index = ele - 'a';
		v1[index]++;
	}
	int max = 0;

	for (int i = 0; i < 26; i++)
	{
		if (v1[max] < v1[i])
			max = i;
		
			
		if ( v1[i]>=5)
			cout << static_cast<char>(i+97);
	}
	if (v1[max] < 5) 
		cout << "PREDAJA";


	

}