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>

int cmp(char s1[4],char s2[4]){
    int answer = 0;
    for(int i = 0;i < 4;i++){
        if(s1[i] == s2[i]){
            answer++;
        }
    }
    if(answer >= 3){
        return 1;
    }else{
        return 0;
    }
}

int main()
{
    char S[4] = "DAY";
    scanf("%s", S);
    if(cmp(S,"SUN")){
        printf("%d",7);
    }else if(cmp(S,"SAT")){
        printf("%d",1);
    }else if(cmp(S,"MON")){
        printf("%d",6);
    }else if(cmp(S,"TUE")){
        printf("%d",5);
    }else if(cmp(S,"WED")){
        printf("%d",4);
    }else if(cmp(S,"THU")){
        printf("%d",3);
    }else if(cmp(S,"FRI")){
        printf("%d",2);
    }
    return 0;
}