import java.util.*;
public class Main {
    public static void main(String args[]) {
		Scanner s = new Scanner(System.in);
		int N,K;
      	N = s.nextInt();
      	K = s.nextInt();
		
      findNumberOfDigits(N,K);

    }
  
  static void findNumberOfDigits(long n, int base) 
    { 
          
        // Calculating log using base changing 
        // property and then taking it  
        // floor and then adding 1. 
        int dig = (int)(	Math.floor( Math.log(n) / Math.log(base)	)  + 1);  
          
          
        // printing output 
        System.out.print(dig); 
    } 
  
}
/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