[Swift 알고리즘] 2016년

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

func solution(_ a:Int, _ b:Int) -> String {
    
    let day = ["FRI","SAT","SUN","MON","TUE","WED","THU"]
    let month = [31,29,31,30,31,30,31,31,30,31,30,31]
    var today = b - 1
    for i in 0..<a - 1 {
        today += month[i]
    }

    return day[today % 7]
}