import java.util.Scanner;

public class Nikola1 {
	public static void main(String[] args) {
		Scanner in = new Scanner(System.in);

		int a = in.nextInt();
		int b = in.nextInt();
		int n = in.nextInt();
		/*System.out.println(1.00/n);
		System.out.println((Math.pow(Math.abs((b*1.00/a)),1.0/3)));*/
		System.out.println(solve(a,b,n));
	}

	static String solve(long a,long b, long n)
	{
		if(b==0)
			return "0";
		else if((Math.ceil(Math.pow(Math.abs((b*1.00/a)), 1.00/n)))-Math.pow(Math.abs((b*1.00/a)), 1.00/n)==0)
		{
			if(b*1.0/a>0)
				return String.format("%.0f", Math.pow((b*1.00/a), 1.00/n));
			else
				return String.format("-%.0f", Math.pow(Math.abs((b*1.00/a)),1.00/n));
		}
		else
			return "No solution";
	}
}