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();
		sc.close();
		int a = 0;
		while(N>0) {
			a++;
			N=N/K;
		}
		System.out.println(a);
	}

} 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();
		sc.close();
		int a = 0;
		while(N>0) {
			a++;
			N=N/K;
		}
		System.out.println(a);
	}

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

} public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int K = sc.nextInt();
		sc.close();
		int a = 0;
		while(N>0) {
			a++;
			N=N/K;
		}
		System.out.println(a);
	}

} 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();
		sc.close();
		int a = 0;
		while(N>0) {
			a++;
			N=N/K;
		}
		System.out.println(a);
	}

}