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 (Clang 3.8.0) (judge verdict: Accepted)

#include <cstdio>
#include <string>
#include <iostream>

using std::string;
using std::cin;

template<class T>inline void fr(T &a) {
    T s=0,w=1;char ch=getchar();
    while(ch<'0'||ch>'9') {if(ch=='-')w=-1;ch=getchar();}
    while(ch>='0'&&ch<='9') s=s*10+ch-'0',ch=getchar();
    a=w*s;
}
template<class T>inline T fr() {T a;fr(a);return a;}
#define R() fr<int>()

string str;

signed main() {
    cin>>str;
    if(str=="MON")puts("6");
    else if(str=="TUE")puts("5");
    else if(str=="WED")puts("4");
    else if(str=="THU")puts("3");
    else if(str=="FRI")puts("2");
    else if(str=="SAT")puts("1");
    else puts("7");
    return 0;
}