import java.util.Scanner;

public class Main {
    static void findNumberOfDigits(long n, int base) {

        int dig = (int)(Math.floor(
                Math.log(n) / Math.log(base))
                + 1);
        System.out.println(dig);
    }

    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);

        int n = sc.nextInt();
        int base = sc.nextInt();


        findNumberOfDigits(n, base);

    }
}
/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