import java.io.*;
import java.util.*;


public class Jump {

	/**
	 * @param args
	 */
	static List<int[]> data = new ArrayList<>();
	private static Scanner dataIn;
	
	public static void main(String[] args) throws IOException {
		readData();
		for(int[] value : data) {
			System.out.println(solver(value));
		}
	}
	
	static void readData() throws IOException {
		dataIn = new Scanner(System.in);
		int[] dataArr = null;
		while(dataIn.hasNextInt() != false || dataIn.hasNext() != false)  {
			int inputSize = dataIn.nextInt();
			if(inputSize > 0) {
				dataArr = new int[inputSize];
				for(int i = 0; i < inputSize; i++) {
					dataArr[i] = dataIn.nextInt();
				}
				data.add(dataArr);
			}
		}
	}
	
	static int solver(int[] input) {
		int output = 0;
		for(int i = 0; i < (input.length - 1); i++) {
			if(input[i] > 0) {
				output += 1;
			}
		}
		
		return output;
	}

}