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++14 (GCC 5.4.1) (judge verdict: Accepted)

#include <iostream>
#include <algorithm>
#include <vector>
#include <string>
#define rep(i,n) for(int i=0;i<n;++i)
#define rep1(i,n) for(int i=1;i<=n;++i)
using namespace std;
int main()
{
  string s;
  cin >> s;

  if(s=="SUN"){
    cout << 7 << "\n";
  }
  else if(s=="MON"){
    cout << 6 << "\n";
  }
  else if(s=="TUE"){
    cout << 5 << "\n";
  }
  else if(s=="WED"){
    cout << 4 << "\n";
  }
  else if(s=="THU"){
    cout << 3 << "\n";
  }
  else if(s=="FRI"){
    cout << 2 << "\n";
  }
  else if(s=="SAT"){
    cout << 1 << "\n";
  }
  return 0;
}