import java.util.Scanner;

public class Main {
  public static void main(String[] args) {

    Scanner sc = new Scanner(System.in);
    String sValue = sc.nextLine();
    String[] sSplitVal = sValue.split(" ");
    String s1 = sSplitVal[0];
    int i2 = Integer.parseInt(sSplitVal[1]);
    String sm = Long.toString(Long.parseLong(s1, 10), i2);
    System.out.print(sm.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