백준알고리즘 1924번 java

import java.util.Scanner;

public class Main {
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int x=sc.nextInt();
        int y=sc.nextInt();
        int day=0;
        for(int i=1; i<x; i++){
            if(i==1 || i==3 || i==5 || i==7 || i==8 || i==10 || i==12){
                day+=31;
            }
            if(i==2){
                day+=28;
            }
            if(i==4 || i==6 || i==9 || i==11){
                day+=30;
            }
        }
        day+=y;
        int week= day%7;
        switch (week){
            case 0:
                System.out.println("SUN");
                break;
            case 1:
                System.out.println("MON");
                break;
            case 2:
                System.out.println("TUE");
                break;
            case 3:
                System.out.println("WED");
                break;
            case 4:
                System.out.println("THU");
                break;
            case 5:
                System.out.println("FRI");
                break;
            case 6:
                System.out.println("SAT");
                break;
        }
    }
}