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 Rust (1.42.0) (judge verdict: Accepted)

fn input_vec<T: std::str::FromStr>()->Vec<T>{
	let mut s = String::new();
	std::io::stdin().read_line(&mut s).ok();
	s.trim().split_whitespace().map(|e| e.parse().ok().unwrap()).collect()
}

fn input<T: std::str::FromStr>()->T{
	let mut s = String::new();
	std::io::stdin().read_line(&mut s).ok();
	s.trim().parse().ok().unwrap()
}

fn main() {
	let n = input::<i64>();
	let input2 = input_vec::<i64>();
	let mut flag = 0;
	for i in 0..n{
		if i % 2 ==0{
			if input2[i as usize]%2!=0{
				flag+=1;
			}
		}
	}
	println!("{}",flag);

    
}