AOJ Volume0-0060

Card Game
http://judge.u-aizu.ac.jp/onlinejudge/description.jsp?id=0060

解法:普通にそのまま

#include<iostream>
#include<string>
#include<map>

using namespace std;


int main() {

    int c1,c2,c3;
    
    while (cin >> c1 >> c2 >> c3) {
        int result = 0;
        for (int i=1; i <= 10; i++) {
            if (i != c1 && i != c2 && i != c3) {
                if (c1 + c2 + i <= 20) {
                    result++;
                }
            }
        }
        //printf("%f.5\n",(double)result/7);
        if ((double)result/7 >= 0.5) {
            cout << "YES" << endl;
        }else {
            cout << "NO" << endl;
        }
    }

}