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 rep(i, n) for (int i = 0; i < (int)(n); ++i)
using namespace std;

int d;
string s;

int main () {
  ios::sync_with_stdio(false);
  cin.tie(0);
  cin >> s;
  if (s == "SUN") d = 7;
  if (s == "MON") d = 6;
  if (s == "TUE") d = 5;
  if (s == "WED") d = 4;
  if (s == "THU") d = 3;
  if (s == "FRI") d = 2;
  if (s == "SAT") d = 1;
  cout << d << endl;
}