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 buf = 1;
    int ans = 0;

    while(buf <= n){
      buf *= k;
      ans += 1;
    }

    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 buf = 1;
    int ans = 0;

    while(buf <= n){
      buf *= k;
      ans += 1;
    }

    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 buf = 1;
    int ans = 0;

    while(buf <= n){
      buf *= k;
      ans += 1;
    }

    System.out.println(ans);
  } main {
    Scanner sc = new Scanner(System.in);

    int n = sc.nextInt();
    int k = sc.nextInt();
    int buf = 1;
    int ans = 0;

    while(buf <= n){
      buf *= k;
      ans += 1;
    }

    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 buf = 1; buf 1 int ans = 0; ans 0 while(buf <= n){
      buf *= k;
      ans += 1;
    } buf <= n buf n {
      buf *= k;
      ans += 1;
    } buf *= k buf k ans += 1 ans 1 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 buf = 1;
    int ans = 0;

    while(buf <= n){
      buf *= k;
      ans += 1;
    }

    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 buf = 1;
    int ans = 0;

    while(buf <= n){
      buf *= k;
      ans += 1;
    }

    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 buf = 1;
    int ans = 0;

    while(buf <= n){
      buf *= k;
      ans += 1;
    }

    System.out.println(ans);
  }
}
