Problems
Even neighbours
Even neighbours
The sequence of integers is given. Count the number of elements with two even neighbours.
Input data
The first line contains the number of elements n~(n \le 1000) in the sequence. The second line contains n elements, each of them does not exceed 100 by absolute value.
Output data
Print the number of elements with two even neighbours.
Examples
Input example #1
6 1 2 3 4 5 6
Output example #1
2