import java.util.Arrays;
import java.util.Scanner;

public class Main {

    public static void main(String[] args) {


        Scanner sc = new Scanner(System.in);
        int[] a =new int[5];
        for(int i=0;i<a.length;i++){
            a[i]=sc.nextInt();
        }
        Arrays.sort(a);
        int result =a[2];
        int e = 0;
        while (e<3) {
            e=0;
            if (result % a[0] == 0) {
                e++;
            }
            if (result % a[1] == 0) {
                e++;
            }
            if (result % a[2] == 0) {
                e++;
            }
            if (result % a[3] == 0) {
                e++;
            }
            if (result % a[4] == 0) {
                e++;
            }
            if (e >= 3) {
                System.out.println(result);
                break;
            }
            result++;


        }
    }
}