[백준] 1924번 : 2007년 - Java(자바)

https://www.acmicpc.net/problem/1924

import java.util.*;
public class Main {
    public static void main(String args[]) {
        Scanner s=new Scanner(System.in);
        int x=s.nextInt(), y=s.nextInt();
        int arr[]={31,28,31,30,31,30,31,31,30,31,30,31};
        int sum=0;
        for(int i=0;i<x-1;i++){
            sum+=arr[i];
        }
        int day=sum+y;
        if(day%7==0) System.out.print("SUN");
        else if(day%7==1) System.out.print("MON");
        else if(day%7==2) System.out.print("TUE");
        else if(day%7==3) System.out.print("WED");
        else if(day%7==4) System.out.print("THU");
        else if(day%7==5) System.out.print("FRI");
        else System.out.print("SAT");
    }
}