2016년

#include <string>
#include <vector>

using namespace std;

string solution(int a, int b) 
{
    string answer = "";
    int i, day = 0;
    
    for(i = 1; i < a; i++)
    {
        if(i == 1 ||i == 3 ||i == 5 ||i == 7 ||i == 8 ||i == 10 ||i == 12)
        {
            day += 31;
        }
        else if(i == 2)
        {
            day += 29;
        }
        else
        {
            day += 30;
        }
    }
    day += (b-1);
    day = day % 7;
    if(day == 0)
    {
        answer = "FRI";
    }
    else if(day == 1)
    {
        answer = "SAT";
    }
    else if(day == 2)
    {
        answer = "SUN";
    }
    else if(day == 3)
    {
        answer = "MON";
    }
    else if(day == 4)
    {
        answer = "TUE";
    }
    else if(day == 5)
    {
        answer = "WED";
    }
    else
    {
        answer = "THU";
    }
    
    return answer;
}