import java.util.Scanner;
public class Main{
public static void main(String[] args){
  Scanner scan = new Scanner(System.in);
  int n = scan.nextInt();
  int k = scan.nextInt();
  int x = 0;
  
  while( n >= Math.pow(k,x)){
    x ++;
  }
  
  System.out.println(x);
}
}

/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