import java.util.Scanner;

public class Main {

	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);

		double N = sc.nextDouble();
		double K = sc.nextDouble();
		double log = Math.log(N) / Math.log(K);
		
		if (Math.floor(log) == log) {
			System.out.println((int)(log + 1));
		} else {
			System.out.println((int)Math.ceil(log));
		}

	}
}
/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