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>
#include<math.h>
#include<string.h>

main(){
  char Week[100];
  int i=0;
  gets(Week);
  
  if(Week[0]=='S' && Week[1] == 'U' && Week[2]=='N'){
    printf("7");
  }
  else if(Week[0]=='S' && Week[1] == 'U' && Week[2]=='T'){
  
    printf("1");
  }
  else if(Week[0]=='F' && Week[1] == 'R' && Week[2]=='I'){
    printf("2");
  }
  else if(Week[0]=='T' && Week[1] == 'H' && Week[2]=='U'){
    printf("3");
  }
  else if(Week[0]=='W' && Week[1] == 'E' && Week[2]=='D'){
    printf("4");
  }
  else if(Week[0]=='T' && Week[1] == 'U' && Week[2]=='E'){
    printf("3");
  }
  else if(Week[0]=='M' && Week[1] == 'O' && Week[2]=='N'){
    printf("2");
  }
  
}