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


public class Main
{
	
	public static void main(String[] args)
	{
		Scanner sc=new Scanner(System.in);
		int j,flag;
		double n,k;
		n=sc.nextDouble();
		k=sc.nextDouble();
		double i = (Math.log(n)/Math.log(k));
		j=(int)(Math.floor(i)+1);
		System.out.println(j);
		
		
		
	}
}
/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