import java.util.Scanner;

public class Main {

	public static void main(String[] args) {

		Scanner scan = new Scanner(System.in);

		int N;
		int K;

		N = scan.nextInt();
		K = scan.nextInt();

		// 割れる回数=桁数
		int ans  = 0;

		while(N  > 0) {
			// NをKで割った商で置き換える
			N = N / K;
			// Nが0になるまでカウント
			ans++;
		}

		System.out.println(ans);

	}
}
/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