import java.util.*;

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

    public static void main(String[] args) {
        long n = Long.parseLong(sc.next());
        long k = Long.parseLong(sc.next());
        StringBuilder sb = new StringBuilder();
        while(n > 0L) {
            sb.append(n % k);
            n /= k;
        }
        System.out.println(sb.toString().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