import 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 = 0;
    while(n > 0) {
      ans++;
      n -= (n % k);
      n /= k;
    }
    System.out.println(ans);
  }
} import java.util.*; util.* java 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 = 0;
    while(n > 0) {
      ans++;
      n -= (n % k);
      n /= k;
    }
    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 = 0;
    while(n > 0) {
      ans++;
      n -= (n % k);
      n /= k;
    }
    System.out.println(ans);
  } main {
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    int k = sc.nextInt();
    int ans = 0;
    while(n > 0) {
      ans++;
      n -= (n % k);
      n /= k;
    }
    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 = 0; ans 0 while(n > 0) {
      ans++;
      n -= (n % k);
      n /= k;
    } n > 0 n 0 {
      ans++;
      n -= (n % k);
      n /= k;
    } ans++ ans n -= (n % k) n (n % k) n k n /= k n k 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 = 0;
    while(n > 0) {
      ans++;
      n -= (n % k);
      n /= k;
    }
    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 = 0;
    while(n > 0) {
      ans++;
      n -= (n % k);
      n /= k;
    }
    System.out.println(ans);
  }
} Main
import 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 = 0;
    while(n > 0) {
      ans++;
      n -= (n % k);
      n /= k;
    }
    System.out.println(ans);
  }
}