#include<bits/stdc++.h>
using namespace std;
int main(){
	long long start,end,base;
	cin >> start >> end >> base;
	if(base>end)
	{
		cout << "-1";
		return 0;
	}
	else
	{
		cout << "1" << " ";
	}
	int transition=base;
	while(1)
	{
		if(transition<end&&transition>start)
		{
			cout << transition << " ";
			transition*=base;
		}
		else
		{
			return 0;
		}
	} 
	return 0;
}