import java.util.*;

public class Main {
	Scanner sc = new Scanner(System.in);
	final int MOD = 1000000007;
	final int MAX = Integer.MAX_VALUE;
	final long LMAX = Long.MAX_VALUE;
	int LEN = (int)1e6 + 1;
	void doIt() {
		int N = sc.nextInt();
		int K = sc.nextInt();
		int cnt = 0;
		while(N > 0) {
			N /= K;
			cnt++;
		}
		System.out.println(cnt);
	}

	public static void main(String[] args) {
		new Main().doIt();
	}

} import java.util.*; util.* java public class Main {
	Scanner sc = new Scanner(System.in);
	final int MOD = 1000000007;
	final int MAX = Integer.MAX_VALUE;
	final long LMAX = Long.MAX_VALUE;
	int LEN = (int)1e6 + 1;
	void doIt() {
		int N = sc.nextInt();
		int K = sc.nextInt();
		int cnt = 0;
		while(N > 0) {
			N /= K;
			cnt++;
		}
		System.out.println(cnt);
	}

	public static void main(String[] args) {
		new Main().doIt();
	}

} Main Scanner sc = new Scanner(System.in); sc new Scanner(System.in) final int MOD = 1000000007; MOD 1000000007 final int MAX = Integer.MAX_VALUE; MAX Integer.MAX_VALUE Integer Integer.MAX_VALUE final long LMAX = Long.MAX_VALUE; LMAX Long.MAX_VALUE Long Long.MAX_VALUE int LEN = (int)1e6 + 1; LEN (int)1e6 + 1 (int)1e6 1 void doIt() {
		int N = sc.nextInt();
		int K = sc.nextInt();
		int cnt = 0;
		while(N > 0) {
			N /= K;
			cnt++;
		}
		System.out.println(cnt);
	} doIt {
		int N = sc.nextInt();
		int K = sc.nextInt();
		int cnt = 0;
		while(N > 0) {
			N /= K;
			cnt++;
		}
		System.out.println(cnt);
	} int N = sc.nextInt(); N sc.nextInt() sc.nextInt sc int K = sc.nextInt(); K sc.nextInt() sc.nextInt sc int cnt = 0; cnt 0 while(N > 0) {
			N /= K;
			cnt++;
		} N > 0 N 0 {
			N /= K;
			cnt++;
		} N /= K N K cnt++ cnt System.out.println(cnt) System.out.println System.out System System.out cnt public static void main(String[] args) {
		new Main().doIt();
	} main {
		new Main().doIt();
	} new Main().doIt() new Main().doIt new Main() String[] args args public class Main {
	Scanner sc = new Scanner(System.in);
	final int MOD = 1000000007;
	final int MAX = Integer.MAX_VALUE;
	final long LMAX = Long.MAX_VALUE;
	int LEN = (int)1e6 + 1;
	void doIt() {
		int N = sc.nextInt();
		int K = sc.nextInt();
		int cnt = 0;
		while(N > 0) {
			N /= K;
			cnt++;
		}
		System.out.println(cnt);
	}

	public static void main(String[] args) {
		new Main().doIt();
	}

} public class Main {
	Scanner sc = new Scanner(System.in);
	final int MOD = 1000000007;
	final int MAX = Integer.MAX_VALUE;
	final long LMAX = Long.MAX_VALUE;
	int LEN = (int)1e6 + 1;
	void doIt() {
		int N = sc.nextInt();
		int K = sc.nextInt();
		int cnt = 0;
		while(N > 0) {
			N /= K;
			cnt++;
		}
		System.out.println(cnt);
	}

	public static void main(String[] args) {
		new Main().doIt();
	}

} Main
import java.util.*;

public class Main {
	Scanner sc = new Scanner(System.in);
	final int MOD = 1000000007;
	final int MAX = Integer.MAX_VALUE;
	final long LMAX = Long.MAX_VALUE;
	int LEN = (int)1e6 + 1;
	void doIt() {
		int N = sc.nextInt();
		int K = sc.nextInt();
		int cnt = 0;
		while(N > 0) {
			N /= K;
			cnt++;
		}
		System.out.println(cnt);
	}

	public static void main(String[] args) {
		new Main().doIt();
	}

}
