Problem

You are given $3$ integers $A, B, C$.

Output $1$ if the sum of the $3$ values is at most $21$, and $0$ otherwise.

Constraints

• $1 \le A \le 13$.
• $1 \le B \le 13$.
• $1 \le C \le 13$.
• All input values are integers.

Input

The input is given in the following format:

A
B
C

Output

Output $1$ if the sum of the $3$ values is at most $21$, and $0$ otherwise.

Do not output anything other than the answer. (Do not output sentences prompting for input, etc.)

Sample Input and Output

Sample Input 1

5
10
6

Sample Output 1

1

• The sum of the $3$ values is $5 + 10 + 6 = 21$, which is at most $21$. Thus, output $1$.

Sample Input 2

7
8
13

Sample Output 2

0

• The sum of the $3$ values is $7 + 8 + 13 = 28$, which is not at most $21$. Thus, output $0$.