解答 - 兩光法師占卜術

#include<iostream>
using namespace std;

int main()
{
    int M, D, S;
    while( cin >> M >> D )
    {
        S = (M*2+D)%3;
        if( S == 0 )
        {
            cout << "普通" << endl;
        }
        if( S == 1 )
        {
            cout << "吉" << endl;
        }
        if( S == 2 )
        {
            cout << "大吉" << endl;
        }
    }
    return 0;
}