import java.util.Scanner;

public class Main {

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

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

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

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

public class Main {

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