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 Kotlin (1.3.71) (judge verdict: Accepted)

fun main(args: Array<String>) {
    val N = readInt()
    val a = readIntList()
    var ans = 0
    for (i in 0 until N step 2) {
        if (a[i] % 2 != 0) ans++
    }
    println(ans)


}


private fun read() = readLine()!!

private fun readInt() = read().toInt()

private fun readLong() = read().toLong()

private fun readDouble() = read().toDouble()

private fun readStringList(): MutableList<String> = read().split(" ").toMutableList()

private fun readIntList(): MutableList<Int> = readStringList().map { it.toInt() }.toMutableList()

private fun readLongList(): MutableList<Long> = readStringList().map { it.toLong() }.toMutableList()

private fun readDoubleList(): MutableList<Double> = readStringList().map { it.toDouble() }.toMutableList()

private fun readStringMatrix(n: Int): MutableList<MutableList<String>> {
    val matrix = mutableListOf<MutableList<String>>()
    for (i in 0 until n) {
        val list = readStringList()
        matrix.add(list)
    }
    return matrix
}

private fun readIntMatrix(n: Int): MutableList<MutableList<Int>> {
    val matrix = mutableListOf<MutableList<Int>>()
    for (i in 0 until n) {
        val list = readIntList()
        matrix.add(list)
    }
    return matrix
}

private fun readDoubleMatrix(n: Int): MutableList<MutableList<Double>> {
    val matrix = mutableListOf<MutableList<Double>>()
    for (i in 0 until n) {
        val list = readDoubleList()
        matrix.add(list)
    }
    return matrix
}

private fun readLongMatrix(n: Int): MutableList<MutableList<Long>> {
    val matrix = mutableListOf<MutableList<Long>>()
    for (i in 0 until n) {
        val list = readLongList()
        matrix.add(list)
    }
    return matrix
}