Problem:
Score : 100 points

Problem Statement

Given is a string S representing the day of the week today.

S is SUN, MON, TUE, WED, THU, FRI, or SAT, for Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, and Saturday, respectively.

After how many days is the next Sunday (tomorrow or later)?

Constraints

S is SUN, MON, TUE, WED, THU, FRI, or SAT.

Input

Input is given from Standard Input in the following format:

S

Output

Print the number of days before the next Sunday.

Sample Input 1

SAT

Sample Output 1

1

It is Saturday today, and tomorrow will be Sunday.

Sample Input 2

SUN

Sample Output 2

7

It is Sunday today, and seven days later, it will be Sunday again.

Solution in Java (OpenJDK 1.8.0) (judge verdict: Accepted)

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		
		Scanner in = new Scanner(System.in);
		
		String s=in.next();
		
		if(s.compareTo("SAT")==0) {
			System.out.println(1);
		}
		else if(s.compareTo("SUN")==0) {
			System.out.println(7);
		}
		else if(s.compareTo("MON")==0) {
			System.out.println(6);
		}
		else if(s.compareTo("TUE")==0) {
			System.out.println(5);
		}
		else if(s.compareTo("WED")==0) {
			System.out.println(4);
		}
		else if(s.compareTo("THU")==0) {
			System.out.println(3);
		}
		else  {
			System.out.println(2);
		}
	}

}