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){

    Scanner sc = new Scanner(System.in);

    String day = sc.next();
    int answer = 0;

    if(day.contains("SUN")){
      answer = 7;
    }else if(day.contains("SAT")){
      answer = 1;
    }else if(day.contains("FRI")){
      answer = 2;
    }else if(day.contains("THU")){
      answer = 3;
    }else if(day.contains("WED")){
      answer = 4;
    }else if(day.contains("TUE")){
      answer = 5;
    }else if(day.contains("MON")){
      answer = 6;
    }

    System.out.println(answer);

  }
}