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 <stdlib.h>
#include <string.h>
#include <ctype.h>
#define max(a, b)	(((a) > (b)) ? (a) : (b))		/* ２個の値の最大値 */
#define min(a, b)	(((a) < (b)) ? (a) : (b))		/* ２個の値の最小値 */
#define ENTER		printf("\n")					/* 改行プリント */
int DBG = 1;										/* デバッグプリント 提出時は0 */
/* main *************************************************************/
int main()
{
	int		a,b,c,i,j,k,n,m,x,y,ans = 0;
	char	str[256];
	
	scanf("%s", str);
	
	if ( strcmp(str,"SUN") == 0) printf("7\n");
	if ( strcmp(str,"MON") == 0) printf("6\n");
	if ( strcmp(str,"TUE") == 0) printf("5\n");
	if ( strcmp(str,"WED") == 0) printf("4\n");
	if ( strcmp(str,"THU") == 0) printf("3\n");
	if ( strcmp(str,"FRI") == 0) printf("2\n");
	if ( strcmp(str,"SAT") == 0) printf("1\n");
	

	return 0;
}