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>
#include <string.h>

int main(void){
	char day[256];
	gets(day);
	char *sun = "SUN";
	char *mon = "MON";
	char *tue = "TUE";
	char *wed = "WED";
	char *thu = "THU";
	char *fri = "FRI";
	if(strcmp(day,sun) == 0){
		printf("7");
	}
	else if(strcmp(day,mon) == 0){
		printf("6");
	}
	else if(strcmp(day,tue) == 0){
		printf("5");
	}
	else if(strcmp(day,wed) == 0){
		printf("4");
	}
	else if(strcmp(day,thu) == 0){
		printf("3");
	}
	else if(strcmp(day,fri) == 0){
		printf("2");
	}
	else{
		printf("1");
	}
}