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<stdio.h>
int main(void) {
  char dayname[100];
  scanf("%s",dayname);
    
  if(dayname == 'SUN') {
    printf(7);
  }
  else if (dayname == 'MON') {
    printf(6);
  }
  else if(dayname == 'TUE') {
    printf(5);
  }
  else if(dayname == 'WED') {
    printf(4);
  }
  else if(dayname == 'THU') {
    printf(3);
  }
  else if(dayname == 'FRI') {
    printf(2);
  }
  else if(dayname == 'SAT') {
    printf(1);
  }
  return 0;

}