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: Wrong Answer)

#include <limits.h>
#include <math.h>
#include <stdio.h>

int main(void) {
  char s[5];
  int ans;
  scanf("%s",&s);
  if(s[0]=='S'){
    if(s[1]=='A'){
      ans=1;
    }else if(s[1]=='U'){
      ans=7;
    }
  }
  if(s[0]=='M'){
      ans=6;
  }
  if(s[0]=='T'){
    if(s[1]=='H'){
      ans=3;
    }else if(s[1]=='U'){
      ans=5;
    }
  }
  if(s[0]=='w'){
      ans=4;
  }
  if(s[0]=='F'){
      ans=3;
  }

  printf("%d\n",ans);
}