import java.util.*;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int cnt = 1;
        while (sc.hasNext()) {
            int x = sc.nextInt();
            if (x == 0) {
                System.out.println(cnt);
                break;
            }
            cnt++;
        }
        sc.close();
    }
} import java.util.*; util.* java public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int cnt = 1;
        while (sc.hasNext()) {
            int x = sc.nextInt();
            if (x == 0) {
                System.out.println(cnt);
                break;
            }
            cnt++;
        }
        sc.close();
    }
} Main public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int cnt = 1;
        while (sc.hasNext()) {
            int x = sc.nextInt();
            if (x == 0) {
                System.out.println(cnt);
                break;
            }
            cnt++;
        }
        sc.close();
    } main {
        Scanner sc = new Scanner(System.in);
        int cnt = 1;
        while (sc.hasNext()) {
            int x = sc.nextInt();
            if (x == 0) {
                System.out.println(cnt);
                break;
            }
            cnt++;
        }
        sc.close();
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int cnt = 1; cnt 1 while (sc.hasNext()) {
            int x = sc.nextInt();
            if (x == 0) {
                System.out.println(cnt);
                break;
            }
            cnt++;
        } sc.hasNext() sc.hasNext sc {
            int x = sc.nextInt();
            if (x == 0) {
                System.out.println(cnt);
                break;
            }
            cnt++;
        } int x = sc.nextInt(); x sc.nextInt() sc.nextInt sc if (x == 0) {
                System.out.println(cnt);
                break;
            } x == 0 x 0 {
                System.out.println(cnt);
                break;
            } System.out.println(cnt) System.out.println System.out System System.out cnt break; cnt++ cnt sc.close() sc.close sc String[] args args public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int cnt = 1;
        while (sc.hasNext()) {
            int x = sc.nextInt();
            if (x == 0) {
                System.out.println(cnt);
                break;
            }
            cnt++;
        }
        sc.close();
    }
} public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int cnt = 1;
        while (sc.hasNext()) {
            int x = sc.nextInt();
            if (x == 0) {
                System.out.println(cnt);
                break;
            }
            cnt++;
        }
        sc.close();
    }
} Main
import java.util.*;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int cnt = 1;
        while (sc.hasNext()) {
            int x = sc.nextInt();
            if (x == 0) {
                System.out.println(cnt);
                break;
            }
            cnt++;
        }
        sc.close();
    }
}