import java.util.Scanner;


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

		Scanner sc = new Scanner(System.in);

		String s = sc.next();
		String ss = sc.next();


        int N = Integer.parseInt(s);
        int R = Integer.parseInt(ss);

        int cont = 0;
        while(N > 0) {
        	N = N / R;
        	cont ++;
        }
        System.out.println(cont);
	}
}
/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