public class Main {

    private static int count = 0;

    private static boolean isSosu(int num1, int num2){

        if(num1 == num2){
            return true;
        }

        if( (num1 % (num2)) == 0){
            return false;
        }else{
            return isSosu(num1,num2 + 1);
        }
    }

    public static void main(String[] args) {

        for(int i = 2; i <= 1000; i++){

            if(isSosu(i,2)){
                System.out.println("ODD :" + i);
                count++;
            }

        }

        System.out.println(count);

    }

}