import java.util.Scanner;

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

} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N= sc.nextInt(),K=sc.nextInt();
		int ans = 0;
		while(N/(int)Math.pow(K, ans)!=0) {
			
			ans++;
		}
		System.out.println(ans);
	} main {
		Scanner sc = new Scanner(System.in);
		int N= sc.nextInt(),K=sc.nextInt();
		int ans = 0;
		while(N/(int)Math.pow(K, ans)!=0) {
			
			ans++;
		}
		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 K=sc.nextInt(); K sc.nextInt() sc.nextInt sc int ans = 0; ans 0 while(N/(int)Math.pow(K, ans)!=0) {
			
			ans++;
		} N/(int)Math.pow(K, ans)!=0 N/(int)Math.pow(K, ans) N (int)Math.pow(K, ans) Math.pow Math K ans 0 {
			
			ans++;
		} ans++ ans 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(),K=sc.nextInt();
		int ans = 0;
		while(N/(int)Math.pow(K, ans)!=0) {
			
			ans++;
		}
		System.out.println(ans);
	}

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

}