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>
using namespace std;

#define rep(i, n) for(long long i=0;i<(long long)(n);i++)
#define rep2(i, s, n) for(long long i=(s);i<(long long)(n);i++)
#define all(v) v.begin(), v.end()

using ll = long long;
using vll = vector<ll>;
using vvll = vector<vll>;

const ll INF = (1LL<<60);

int main(){

    string s; cin >> s;

    if(s == "SUN") cout << 7 << endl;
    if(s == "MON") cout << 6 << endl;
    if(s == "TUE") cout << 5 << endl;
    if(s == "WED") cout << 4 << endl;
    if(s == "THU") cout << 3 << endl;
    if(s == "FRI") cout << 2 << endl;
    if(s == "SAT") cout << 1 << endl;

    return 0;
}