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 = "SUN";
    char *s2 = "MON";
    char *s3 = "TUE";
    char *s4 = "WED";
    char *s5 = "THU";
    char *s6 = "FRI";
    char *s7 = "SAT";
    
    char s[3];
    scanf("%s",&s);
    if(strcmp(s,s1)==0){
        printf("7");
    }
    else if(strcmp(s,s2)==0){
        printf("6");
    }
        else if(strcmp(s,s3)==0){
        printf("5");
    }
    else if(strcmp(s,s4)==0){
        printf("4");
    }
    else if(strcmp(s,s5)==0){
        printf("3");
    }
    else if(strcmp(s,s6)==0){
        printf("2");
    }
    else if(strcmp(s,s7)==0){
        printf("1");
    }

}