# Even neighbours

Very easy

Execution time limit is 1 second

Runtime memory usage limit is 128 megabytes

The sequence of integers is given. Count the number of elements with two even neighbours.

## Input

The first line contains the number of elements $n(n≤1000)$ in the sequence. The second line contains $n$ elements, each of them does not exceed $100$ by absolute value.

## Output

Print the number of elements with two even neighbours.

## Examples

Input #1

Answer #1

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