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: Wrong Answer)

#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <string.h>

int main(void) {
    char day[5];
    scanf("%s", day);
    int num;
    if (strcmp(day, "SUN") == 0) {
        num = 7;
    } else if (strcmp(day, "MON") == 0) {
        num = 6;
    } else if (strcmp(day, "TUE") == 0) {
        num = 5;
    } else if (strcmp(day, "WED") == 0) {
        num = 4;
    } else if (strcmp(day, "TUE") == 0) {
        num = 3;
    } else if (strcmp(day, "FRI") == 0) {
        num = 2;
    } else if (strcmp(day, "SAT") == 0) {
        num = 1;
    }

    printf("%d\n", num);

    return 0;
}