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 Java8 (OpenJDK 1.8.0) (judge verdict: Accepted)

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {

		try(Scanner sc = new Scanner(System.in)) {

			String s = sc.next();
			int ans = 0;
			if("SUN".equals(s)) {
				ans = 7;
			}
			if("MON".equals(s)) {
				ans = 6;
			}
			if("TUE".equals(s)) {
				ans = 5;
			}
			if("WED".equals(s)) {
				ans = 4;
			}
			if("THU".equals(s)) {
				ans = 3;
			}
			if("FRI".equals(s)) {
				ans = 2;
			}
			if("SAT".equals(s)) {
				ans = 1;
			}

			System.out.println(ans);

		}

	}

}