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 <string.h>

int main(void)
{
	char day[7][4] = {"SUN", "MON", "TUE", "WED", "THU", "FRI", "SAT"};
	char s[4];

	scanf("%s", s);

	if (s == day[0])
	{
		printf("7\n");
	}
	else if (s == day[1])
	{
		printf("6\n");
	}
	else if (s == day[2])
	{
		printf("5\n");
	}
	else if (s == day[3])
	{
		printf("4\n");
	}
	else if (s == day[4])
	{
		printf("3\n");
	}
	else if (s == day[5])
	{
		printf("2\n");
	}
	else if (s == day[6])
	{
		printf("1\n");
	}

	return 0;
}