Problem:
Score : 200 points

Problem Statement

We have N squares assigned the numbers 1,2,3,\ldots,N. Each square has an integer written on it, and the integer written on Square i is a_i.

How many squares i satisfy both of the following conditions?

The assigned number, i, is odd.

The written integer is odd.

Constraints

All values in input are integers.

1 \leq N, a_i \leq 100

Input

Input is given from Standard Input in the following format:

N
a_1 a_2 \cdots a_N

Output

Print the number of squares that satisfy both of the conditions.

Sample Input 1

5
1 3 4 5 7

Sample Output 1

2

Two squares, Square 1 and 5, satisfy both of the conditions.

For Square 2 and 4, the assigned numbers are not odd.

For Square 3, the written integer is not odd.

Sample Input 2

15
13 76 46 15 50 98 93 77 31 43 84 90 6 24 14

Sample Output 2

3

Solution in C (GCC 9.2.1) (judge verdict: Accepted)

#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
#include <string.h>

int	main(void)
{
	int n;
	scanf("%d",&n);

	int *a;
	a = (int *)malloc(sizeof(int)*(n));
	int i = 0;
	while (i < n)
	{
		scanf("%d",&(a[i]));
		i++;
	}
	int cnt = 0;
	i = 0;
	while (i < n)
	{
		if (i%2 == 0 && a[i]%2 != 0)
			cnt++;
		i++;
	}
	printf("%d\n", cnt);
	return (0);
}