Problem9413--ABC209 —— A - Counting

9413: ABC209 —— A - Counting

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Time Limit : 1.000 sec  Memory Limit : 512 MiB

Description

How many integers not less than $A$ and not more than $B$ are there?

Input

Input is given from Standard Input in the following format:

```
$A$ $B$
```

Output

Print the number of integers not less than $A$ and not more than $B$.

Constraints

-   $1 \leq A \leq 100$
-   $1 \leq B \leq 100$
-   $A$ and $B$ are integers.

Sample 1 Input

2 4

Sample 1 Output

3
We have three integers not less than 2 and not more than 4: 2, 3, 4, so we should print 3.

Sample 2 Input

10 100

Sample 2 Output

91

Sample 3 Input

3 2

Sample 3 Output

0
We have no integers not less than 3 and not more than 2, so we should print 0.

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