import java.util.Scanner;
public class Main {
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        long n = sc.nextInt();
        int k = sc.nextInt();
        int s = 1 , cou = 0;
        long q = 1;
        while(s == 1){
            q = q * k;
            cou++;
            if(n < q){
                s = cou;
                s = 0;
            }
        }
        System.out.println(cou);
        sc.close();
    }
}
/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