백준 2490번 C++ 풀이

#include <iostream>
#include <cstring>
#include <algorithm>

#include <cmath>

using namespace std;
int buffer[4];

int main() {
    cin.tie(NULL);


    ios::sync_with_stdio(false);
    for (int j = 0; j<3; j++) {
        for (int i = 0; i < 4; i++) {
            cin >> buffer[i];
        }
        sort(buffer, buffer + 4);
        if (buffer[0] == 1) {
            cout << 'E';
        } else if (buffer[1] == 1) {
            cout << 'A';
        } else if (buffer[2] == 1) {
            cout << 'B';
        } else if (buffer[3] == 1) {
            cout << 'C';
        } else {
            cout << 'D';
        }
        cout << '\n';
    }
    return 0;
}