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 <assert.h>
#include <stdio.h>
#include <string.h>
#include <math.h>

/*
	入力例：
	3
	1 1 3
*/

int main(){
	long N=0;
	long R=0;
	long d=0;
	long p,e,z;
	long iResult=0;
	scanf("%ld", &N);
	long a[N];
	for(long i=0;i<N;i++){
		scanf("%ld", &a[i]);
	}
	long iCnt;
	iCnt=0;
	for(long i=0;i<N;i=i+2){
		if (a[i]%2==1) {
			iCnt++;
		}
	}
	printf("%ld\n",iCnt);
	return 0;
}