import java.util.*;

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

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