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import java.util.*;

public class Program47 {

//Write a program to find if a number is power of 2 or not

public static void main(String[] args) {

Scanner sc = new Scanner(System.in);

int num = sc.nextInt();

if (num <= 0) {

System.out.println("Not a power of 2");

} else if ((num & (num - 1)) == 0) {

System.out.println("Power of 2");

} else {

System.out.println("Not a power of 2");

}

}

}