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 Pascal (FPC 3.0.4) (judge verdict: Accepted)

program bt;

var n,i,t:integer;
    a:array[1..1000] of integer;

begin
   readln(n);
   for i:=1 to n-1 do
    read(a[i]);
   readln(a[n]);
   t:=0;
   for i:=1 to n do
    if (i mod 2=1) and (a[i] mod 2=1) then t:=t+1;
   write(t);
   readln;
end.