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# (.NET Core 3.1.201) (judge verdict: Accepted)

using System;

public class Odds{
   public int getNOdd(int n, int[]arr){
      int ct = 0;
      for(int i=0;i<n;i+=2){
         if((arr[i]%2)==1){
	    ct++;
	 }
      }
      return ct;
   }
       static int[]strToIntArr(String s){
//          s = s.Substring(1,s.Length-2);
	  string[] strArr = s.Split(new char[]{' '});
	  int len = strArr.Length;
          int[] retArr = new int[len];       
	  for(int i=0;i<len;i++){
	     string sVal = strArr[i];
	     int intVal = int.Parse(sVal);
	     retArr[i] = intVal;
	  }
          return retArr;
       }
       
   public static void Main(string[]args){
      Odds o = new Odds();
      string nLn, aLn;
      nLn  = Console.ReadLine();
      aLn  = Console.ReadLine();
      int n = int.Parse(nLn);
      int[]arr = strToIntArr(aLn);
      int nOdd = o.getNOdd(n,arr);
      Console.WriteLine("{0}",nOdd);
   }
}