import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int K = sc.nextInt();
		int ans = 1;
		int unchange = K;

		while(N/K>0) {
			ans++;
			K = K*unchange;
		}

		System.out.println(ans);
	}
} import java.util.Scanner; Scanner java.util public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int K = sc.nextInt();
		int ans = 1;
		int unchange = K;

		while(N/K>0) {
			ans++;
			K = K*unchange;
		}

		System.out.println(ans);
	}
} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int K = sc.nextInt();
		int ans = 1;
		int unchange = K;

		while(N/K>0) {
			ans++;
			K = K*unchange;
		}

		System.out.println(ans);
	} main {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int K = sc.nextInt();
		int ans = 1;
		int unchange = K;

		while(N/K>0) {
			ans++;
			K = K*unchange;
		}

		System.out.println(ans);
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int N = sc.nextInt(); N sc.nextInt() sc.nextInt sc int K = sc.nextInt(); K sc.nextInt() sc.nextInt sc int ans = 1; ans 1 int unchange = K; unchange K while(N/K>0) {
			ans++;
			K = K*unchange;
		} N/K>0 N/K N K 0 {
			ans++;
			K = K*unchange;
		} ans++ ans K = K*unchange K K*unchange K unchange System.out.println(ans) System.out.println System.out System System.out ans String[] args args public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int K = sc.nextInt();
		int ans = 1;
		int unchange = K;

		while(N/K>0) {
			ans++;
			K = K*unchange;
		}

		System.out.println(ans);
	}
} public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int K = sc.nextInt();
		int ans = 1;
		int unchange = K;

		while(N/K>0) {
			ans++;
			K = K*unchange;
		}

		System.out.println(ans);
	}
} Main
import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int K = sc.nextInt();
		int ans = 1;
		int unchange = K;

		while(N/K>0) {
			ans++;
			K = K*unchange;
		}

		System.out.println(ans);
	}
}