import java.util.Scanner;
public class scratch {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int[] arrayInt = new int[5];
        for (int i=0;i < 5;i++){
            arrayInt[i] = Integer.parseInt(scanner.nextLine());
        }

        int result = 0;
        int counter = 0;
        while (counter < 3){
            result++;
            if (result % arrayInt[0] == 0){
                counter++;
            }
            if (result % arrayInt[1] == 0){
                counter++;
            }
            if (result % arrayInt[2] == 0){
                counter++;
            }
            if (result % arrayInt[3] == 0){
                counter++;
            }
            if (result % arrayInt[4] == 0){
                counter++;
            }


            if (counter < 3){
                counter = 0;
            }
        }
        System.out.println(result);
    }
}