import java.util.*;
import java.io.*;
import java.lang.*;

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

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