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 9.2.1) (judge verdict: Accepted)

#include <stdio.h>
//  SUN,MON,TUE,WED,THU,FRI,SAT
int main()
{
  int d = 0;
  char s[5];
  scanf("%s", s);
  switch(s[0]) {
  case 'S':
    if(s[1]=='U') {
      d = 7;
    } else {
      d = 1;
    }
    break;
  case 'M':
    d = 6;
    break;
  case 'T':
    if(s[1]=='U') {
      d = 5;
    } else {
      d = 3;
    }
    break;
  case 'W':
    d = 4;
    break;
  case 'F':
    d = 2;
    break;
  default:
    d = 99999;
  }
  printf("%d\n", d);
  return 0;
}