import java.util.*;
public class Main {
public static void main(String[] args){
	Scanner sc = new Scanner(System.in);
  	int N = sc.nextInt();
  	int K = sc.nextInt();
  	String num = "";
  	while(N>0){
		num = num + N%K;
      	N = (int) N/K;
      	//System.out.println("N:" + N);
      	//System.out.println("num:" + num);
    }

	System.out.println(num.length());
}
}
/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