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: Runtime Error)

import java.util.Scanner;

public class Main {

  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    long a = sc.nextLong();
    long b = sc.nextLong();
    long x = sc.nextLong();

    if (a + b > x) {
      System.out.println(0);
      System.exit(0);
    }
    if (a * 1000000000 + b * 10 <= x) {
      System.out.println(1000000000);
      System.exit(0);
    }

    for (int d = 9; d >= 1; --d) {
      long n = (long) ((double) (x - (b * d)) / a);

      if (n >= Math.pow(10, d - 1)) {
        if (n <= Math.pow(10, d) - 1)
          System.out.println(n);
        else
          System.out.println((long) Math.pow(10, d) - 1);
        System.exit(0);
      }
    }

    System.out.println(9);
  }
}