import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        // Your code here!
        
        Scanner scan = new Scanner(System.in);
        
        for (int i = 1; i <= 5; i++){
            int x = scan.nextInt();
            
            if (x == 0){
                System.out.println(i);
                break;
            }
        }
    }
} import java.util.*; util.* java public class Main {
    public static void main(String[] args) throws Exception {
        // Your code here!
        
        Scanner scan = new Scanner(System.in);
        
        for (int i = 1; i <= 5; i++){
            int x = scan.nextInt();
            
            if (x == 0){
                System.out.println(i);
                break;
            }
        }
    }
} Main public static void main(String[] args) throws Exception {
        // Your code here!
        
        Scanner scan = new Scanner(System.in);
        
        for (int i = 1; i <= 5; i++){
            int x = scan.nextInt();
            
            if (x == 0){
                System.out.println(i);
                break;
            }
        }
    } main {
        // Your code here!
        
        Scanner scan = new Scanner(System.in);
        
        for (int i = 1; i <= 5; i++){
            int x = scan.nextInt();
            
            if (x == 0){
                System.out.println(i);
                break;
            }
        }
    } Scanner scan = new Scanner(System.in); scan new Scanner(System.in) for (int i = 1; i <= 5; i++){
            int x = scan.nextInt();
            
            if (x == 0){
                System.out.println(i);
                break;
            }
        } int i = 1; int i = 1; i 1 i <= 5 i 5 i++ i++ i {
            int x = scan.nextInt();
            
            if (x == 0){
                System.out.println(i);
                break;
            }
        } {
            int x = scan.nextInt();
            
            if (x == 0){
                System.out.println(i);
                break;
            }
        } int x = scan.nextInt(); x scan.nextInt() scan.nextInt scan if (x == 0){
                System.out.println(i);
                break;
            } x == 0 x 0 {
                System.out.println(i);
                break;
            } System.out.println(i) System.out.println System.out System System.out i break; String[] args args public class Main {
    public static void main(String[] args) throws Exception {
        // Your code here!
        
        Scanner scan = new Scanner(System.in);
        
        for (int i = 1; i <= 5; i++){
            int x = scan.nextInt();
            
            if (x == 0){
                System.out.println(i);
                break;
            }
        }
    }
} public class Main {
    public static void main(String[] args) throws Exception {
        // Your code here!
        
        Scanner scan = new Scanner(System.in);
        
        for (int i = 1; i <= 5; i++){
            int x = scan.nextInt();
            
            if (x == 0){
                System.out.println(i);
                break;
            }
        }
    }
} Main
import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        // Your code here!
        
        Scanner scan = new Scanner(System.in);
        
        for (int i = 1; i <= 5; i++){
            int x = scan.nextInt();
            
            if (x == 0){
                System.out.println(i);
                break;
            }
        }
    }
}
