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 <bits/stdc++.h>
#define INF 2e9
using namespace std;
typedef long long llong;
typedef long double ldouble;
int main()
{
  cout<<fixed<<setprecision(10);
  string S;
  cin >> S;
  if(S=="SUN") cout << 7 << endl;
  else if(S=="MON") cout << 6 << endl;
  else if(S=="TUE") cout << 5 << endl;
  else if(S=="WED") cout << 4 << endl;
  else if(S=="THU") cout << 3 << endl;
  else if(S=="FRI") cout << 2 << endl;
  else if(S=="SAT") cout << 1 << endl;
}