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;

class Main {
  public static void main(String[] args) {
    Scanner stdIn = new Scanner(System.in);
    String s = stdIn.next();
    int ans = 0;

    if (s.equals("SUN")) {
      ans = 7;
    } else if (s.equals("MON")) {
      ans = 6;
    } else if (s.equals("TUE")) {
      ans = 5;
    } else if (s.equals("WED")) {
      ans = 4;
    } else if (s.equals("THU")) {
      ans = 3;
    } else if (s.equals("FRI")) {
      ans = 2;
    } else {
      ans = 1;
    }

    System.out.println(ans);
  }
}