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 C# (Mono 4.6.2.0) (judge verdict: Accepted)

using System;
using System.Text;
using System.Collections.Generic;
using System.Linq;
using E = System.Linq.Enumerable;
 
class Program
 {

        static void Main(string[] args)
        {
          //var N = int.Parse(Console.ReadLine());
          //var S = Console.ReadLine().Split(' ').Select(x => int.Parse(x)).ToArray();
          var S = Console.ReadLine();
          
          if(S == "SUN"){
            Console.WriteLine(7);
          }else if(S == "MON"){
            Console.WriteLine(6);
          }else if(S == "TUE"){
            Console.WriteLine(5);
          }else if(S == "WED"){
            Console.WriteLine(4);
          }else if(S == "THU"){
            Console.WriteLine(3);
          }else if(S == "FRI"){
            Console.WriteLine(2);
          }else if(S == "SAT"){
            Console.WriteLine(1);
          }
        }
  

}