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);
}

}