import java.util.*;
import java.util.Scanner;
public class Main {
public static void main(String args[]) {
Scanner sc = new Scanner (System.in);
int number = sc.nextInt();
int originalNumber, remainder, result = 0;
originalNumber = number;
while (originalNumber != 0)
{
remainder = originalNumber % 10;
result += Math.pow(remainder, 3);
originalNumber /= 10;
}
if(result == number)
System.out.println("true");
else
System.out.println("false");
}
}