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 (Clang 3.8.0) (judge verdict: Accepted)

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

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

    return 0;
}