import java.util.*;
public class Main { public static void main(String[] args) { int count = 0; Scanner scanner = new Scanner(System.in);
//write your code here......
boolean exit = true;
int num;
do{
num = scanner.nextInt();
if(num < 2147483647 && num > 0){
count++;
}
if(num <= 0){
break;
}
}while(true);
System.out.println(count);
}
}