import java.util.*;
import java.lang.Math;

public class Main
{
	public static void main(String args[])
	{
		Scanner s1=new Scanner (System.in);
		double n,r;
		n=s1.nextDouble();
		r=s1.nextDouble();
		double m = (Math.log(n)/Math.log(r));
		int count=(int)(Math.floor(m)+1);
		System.out.println(count);
	}
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz