import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int result = 1;
        for (result=1; result<=5; result++) {
            int xi = sc.nextInt();
            if (xi == 0) {
                break;
            }
        }
        System.out.println(result);
    }
} import java.util.*; util.* java public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int result = 1;
        for (result=1; result<=5; result++) {
            int xi = sc.nextInt();
            if (xi == 0) {
                break;
            }
        }
        System.out.println(result);
    }
} Main public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int result = 1;
        for (result=1; result<=5; result++) {
            int xi = sc.nextInt();
            if (xi == 0) {
                break;
            }
        }
        System.out.println(result);
    } main {
        Scanner sc = new Scanner(System.in);
        int result = 1;
        for (result=1; result<=5; result++) {
            int xi = sc.nextInt();
            if (xi == 0) {
                break;
            }
        }
        System.out.println(result);
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int result = 1; result 1 for (result=1; result<=5; result++) {
            int xi = sc.nextInt();
            if (xi == 0) {
                break;
            }
        } result=1; result=1 result 1 result<=5 result 5 result++ result++ result {
            int xi = sc.nextInt();
            if (xi == 0) {
                break;
            }
        } {
            int xi = sc.nextInt();
            if (xi == 0) {
                break;
            }
        } int xi = sc.nextInt(); xi sc.nextInt() sc.nextInt sc if (xi == 0) {
                break;
            } xi == 0 xi 0 {
                break;
            } break; System.out.println(result) System.out.println System.out System System.out result String[] args args public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int result = 1;
        for (result=1; result<=5; result++) {
            int xi = sc.nextInt();
            if (xi == 0) {
                break;
            }
        }
        System.out.println(result);
    }
} public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int result = 1;
        for (result=1; result<=5; result++) {
            int xi = sc.nextInt();
            if (xi == 0) {
                break;
            }
        }
        System.out.println(result);
    }
} Main
import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int result = 1;
        for (result=1; result<=5; result++) {
            int xi = sc.nextInt();
            if (xi == 0) {
                break;
            }
        }
        System.out.println(result);
    }
}