import java.util.Scanner;

public class Main {
	static Scanner scn = new Scanner(System.in);

	public static void main(String[] args) {
		int n = scn.nextInt();
		int k = scn.nextInt();
		int ans = (int) (Math.log(n) / Math.log(k)) + 1;
		System.out.println(ans);
	}
}

/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