import java.util.*;
class Main{
  public static void main(String[]args){
    Scanner sc=new Scanner(System.in);
    int n=sc.nextInt()+1;
    int k=sc.nextInt();
    int m=k;
    int po=1;
    while(m<n){
      m*=k;
      po++;
    }
    System.out.print(po);
  }
}

/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