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 (GCC 5.4.1) (judge verdict: Accepted)

#include <stdio.h>
 
int main(void){
 
    char S[3];
    int n = 0;

    scanf("%s", S);
    
    if(strcmp("SUN",S) == 0)
        n = 0;
    if(strcmp("MON",S) == 0)
        n = 1;
    if(strcmp("TUE",S) == 0)
        n = 2;
    if(strcmp("WED",S) == 0)
        n = 3;
    if(strcmp("THU",S) == 0)
        n = 4;
    if(strcmp("FRI",S) == 0)
        n = 5;
    if(strcmp("SAT",S) == 0)
        n = 6;

    n = 7 - n;
    printf("%d\n", n);
 
    return 0;
}