import java.io.*;
import java.util.Arrays;
import java.util.Scanner;
import java.util.HashSet;
import java.util.*;

public class Main {
		public static void main(String[] args) throws Exception{
			Scanner sc=new Scanner(System.in);
			PrintWriter pw= new PrintWriter(System.out);
			int n=sc.nextInt();
			int k=sc.nextInt();
			int count=0;
			int temp=1;
			while(n>=Math.pow(k, temp)) {
				temp++;
			}
			pw.println(temp);
			sc.close();
			pw.close();
			
		}
	
	
}

/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