package main

import (
	"bufio"
	"fmt"
	"io"
	"os"
)

func solve(in io.Reader, out, err io.Writer) {
	num, result := 0, 0
	fmt.Fscan(in, &num)
	for temp, i := 0, 0; i < num; i++ {
		fmt.Fscan(in, &temp)
		if temp%2 == 0 {
			result += 2
		}
		result--
	}
	if result < 0 {
		result = -result
	}

	fmt.Fprintln(out, result)
}

func main() {
	br := bufio.NewReaderSize(os.Stdin, int(1e6))
	solve(br, os.Stdout, os.Stderr)
}