import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        long x = Long.parseLong(scanner.next());
        long y = 1;
        while (true) {
            long z = (x * y);
            if (isSquare(z)) {
                break;
            }
            y++;
        }
        System.out.print(y);
    }

    private static boolean isSquare(long z) {
        double sqrt = Math.floor(Math.sqrt(z));
        return (sqrt * sqrt) == z;
    }
}