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>

int main(){
	int i;
	char x[10];
    i = 0;
  if(scanf("%s", &x)== 1);
	
	if (strcmp(x,"SUN")==0){
		i = i + 7;
		printf("%d", i);
	}
	if (strcmp(x,"MON")==0){
		i = i + 6;
		printf("%d", i);
	}
	if (strcmp(x,"TUE")==0){
		i = i + 5;
		printf("%d", i);
	}
	if (strcmp(x,"WED")==0){
		i = i + 4;
		printf("%d", i);
	}
	if (strcmp(x,"THU")==0){
		i = i + 3;
		printf("%d", i);
	}
	if (strcmp(x,"FRI")==0){
		i = i + 2;
		printf("%d", i);
	}
	if (strcmp(x,"SAT")==0){
		i = i + 1;
		printf("%d", i);
	}

    return 0;
}