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()
{
    char s1[10],s2[10]="SUN";
    int n,i;
    gets(s1);
    n=strcmp(s1,s2);
    if(n==0){
        printf("7\n");
    }
    else{
        i=strcmp(s1,"SAT");
        if(i==0){
            printf("1\n");
        }
        i=strcmp(s1,"FRI");
        if(i==0){
            printf("2\n");
        }
        i=strcmp(s1,"THU");
        if(i==0){
            printf("3\n");
        }
        i=strcmp(s1,"WED");
        if(i==0){
            printf("4\n");
        }
        i=strcmp(s1,"TUE");
        if(i==0){
            printf("5\n");
        }
        i=strcmp(s1,"MON");
        if(i==0){
            printf("6\n");
        }

    }
    return 0;
}