import java.util.*;
 
public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = 5;
		int count = 0;
		int[] x = new int[N];
		for(int i = 0; i < N; i ++){
			x[i] = sc.nextInt(); 

			if(x[i] == 0){
				count = i + 1;
				break;
			}
		}

		System.out.println(count);
	}
} import java.util.*; util.* java public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = 5;
		int count = 0;
		int[] x = new int[N];
		for(int i = 0; i < N; i ++){
			x[i] = sc.nextInt(); 

			if(x[i] == 0){
				count = i + 1;
				break;
			}
		}

		System.out.println(count);
	}
} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = 5;
		int count = 0;
		int[] x = new int[N];
		for(int i = 0; i < N; i ++){
			x[i] = sc.nextInt(); 

			if(x[i] == 0){
				count = i + 1;
				break;
			}
		}

		System.out.println(count);
	} main {
		Scanner sc = new Scanner(System.in);
		int N = 5;
		int count = 0;
		int[] x = new int[N];
		for(int i = 0; i < N; i ++){
			x[i] = sc.nextInt(); 

			if(x[i] == 0){
				count = i + 1;
				break;
			}
		}

		System.out.println(count);
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int N = 5; N 5 int count = 0; count 0 int[] x = new int[N]; x new int[N] N for(int i = 0; i < N; i ++){
			x[i] = sc.nextInt(); 

			if(x[i] == 0){
				count = i + 1;
				break;
			}
		} int i = 0; int i = 0; i 0 i < N i N i ++ i ++ i {
			x[i] = sc.nextInt(); 

			if(x[i] == 0){
				count = i + 1;
				break;
			}
		} {
			x[i] = sc.nextInt(); 

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

			if(x[i] == 0){
				count = i + 1;
				break;
			}
		}

		System.out.println(count);
	}
} public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = 5;
		int count = 0;
		int[] x = new int[N];
		for(int i = 0; i < N; i ++){
			x[i] = sc.nextInt(); 

			if(x[i] == 0){
				count = i + 1;
				break;
			}
		}

		System.out.println(count);
	}
} Main
import java.util.*;
 
public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = 5;
		int count = 0;
		int[] x = new int[N];
		for(int i = 0; i < N; i ++){
			x[i] = sc.nextInt(); 

			if(x[i] == 0){
				count = i + 1;
				break;
			}
		}

		System.out.println(count);
	}
}