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) {
		String arr[] = 
			{"SUN","MON","TUE","WED","THU","FRI","SAT" };
		Scanner sc = new Scanner(System.in);
		String S = sc.next();
		int a = 0;
		for(int i = 0 ; i < arr.length ; ++i) {
			if(arr[i].equals(S)) {
				a = i;
			}
		}
		a = 7 - a;
		System.out.println(a);
		
	}
}