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);
    int a = sc.nextInt();
    int b = sc.nextInt();
    long c = sc.nextInt();
    long ans = 0;
    for(int i = 1;;i++){
      int d = keta(i);
      if((a * i) + (b * d) > c){
        ans = i - 1;
        break;
      }
    }
    System.out.println(ans);
  }
        
  static int keta(int x){
    int ketaCounter = 1;
    for(long j = 10;;j *= 10){
      if(x < j){
        break;
      }
      ketaCounter++;    
    }
    return ketaCounter;
  }
        
}