import java.util.*;

public class Main {
    public static void main(String[] args) {
        int count = 0;
        Scanner scanner = new Scanner(System.in);
        while(true)
        {
            if(scanner.nextInt()<=0)break;
            if(!scanner.hasNextInt())break;
            count++;
        }
        System.out.println(count);
    }
}