Lottery Ticket Score Calculation

Background

Congcong received a special lottery ticket.

Problem Description

You have a blue lottery ticket, with integers $a, b,$ and $c$ on it. This makes three pairs, which we'll call $ab$, $bc$, and $ac$. Consider the sum of the numbers in each pair.

• If any pair sums to exactly $10$, the result is $10$.
• Otherwise, if the $ab$ sum ($a+b$) is exactly $10$ more than either the $bc$ sum ($b+c$) or the $ac$ sum ($a+c$), the result is $5$.
• Otherwise, the result is $0$.

Input Format

Input is given from standard input in the following format.

$a$ $b$ $c$

Output Format

Output is printed to standard output in the following format.

An integer representing the calculated score.

Sample

9 1 0

10

Sample Explanation

$a=9, b=1, c=0$. $a+b = 9+1 = 10$. Since the $ab$ pair sums to $10$, the result is $10$.

9 2 0

0

Sample Explanation

$a=9, b=2, c=0$. $a+b = 11$, $b+c = 2$, $a+c = 9$. No pair sums to $10$. $a+b=11$ is not exactly $10$ more than $b+c=2$ ($11-2=9 \neq 10$), nor is it exactly $10$ more than $a+c=9$ ($11-9=2 \neq 10$). So the result is $0$.

6 1 4

10

Sample Explanation

$a=6, b=1, c=4$. $b+c = 1+4 = 5$. $a+c = 6+4 = 10$. Since the $ac$ pair sums to $10$, the result is $10$.

Constraints

• $0 \le a, b, c \le 100$
• Time limit: 1 second
• Memory limit: 1024KB