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>
using namespace std;

int main() {
	string s;
	cin>>s;
	string s1="SUNMONTUEWEDTHUFRISAT";
	int c=0;
	for(int i=0; i<s1.length(); i++) {
	    for(int j=0; j<3; j++) {
	        if(s[j]!=s1[i+j]) {
	            c=0;
	            break;
	        }
	        c++;
	    }
	    if(c==3) {
	        int x = (i+1)/3;
	        int ans = 7 - x;
	        cout<<ans;
	        break;
	    }
	}
	return 0;
}