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 JavaScript (Node.js 12.16.1) (judge verdict: Accepted)

"use strict"

function Main(input) {
  
	var readlines = input.split("\n");
	var n = readlines[0];
	var a = readlines[1].split(" ").map(Number);
	var ans = 0;
	for(let i = 0; i < n; i++){
	  if(i % 2 === 0 && a[i] % 2 === 1){
	    ans++;
	  }
	}
	
	console.log(ans);
}

Main(require("fs").readFileSync("/dev/stdin", "utf8"));