import java.util.Scanner;

class Main{

    public static void main(String[] args){
        
        Scanner scanner = new Scanner(System.in);
        long n = scanner.nextLong();
        long r = scanner.nextLong();
        scanner.close();
        int count = 0;
        while(n>=r){
            count += 1;
            n = n/r;
        }
        System.out.println(count+1);
    }
}
/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