import java.util.Scanner;

class Main {
    static Scanner sc;
    public static void main(final String[] args) {

        sc = new Scanner(System.in);
        final int N = parseInt();
        final int K = parseInt();

        System.out.println(findBaseK(N, K));

    }

    public static int findBaseK(int n, final int k) {
        if(n==0) return 1;

        int i = 0;
        while(n!=0){
            n = Math.floorDiv(n, k);
            i++;
        }


        return i;
    }

    public static int parseInt(){
        return Integer.parseInt(sc.next());
    }
}
/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