LV. 1 :: 2016년

https://school.programmers.co.kr/learn/courses/30/lessons/12901#

프로그래머스

 

function solution(a, b) 
{
    var day = ["FRI","SAT","SUN","MON","TUE","WED","THU"];
    var month = [31,29,31,30,31,30,31,31,30,31,30,31];
    var monthsum = 0;
    
    for(i=0; i<a-1; i++) monthsum += month[i];
    
    return day[(monthsum+b-1)%7];
}