import java.util.*;
public class p180ex6 
{
	
	static Scanner in= new Scanner(System.in);
	public static void main(String[] args) 
	{
		int counter = 0;
		int a = 0;
			while(a >= 0)
			{
				a = in.nextInt();
				if(a>0)
				counter ++;
			}
		System.out.println(counter);
	}

}