import java.util.Scanner;
public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    long n = sc.nextLong();
    long k = sc.nextLong();
    int count = 0;
    while(n > 0){
      n = n/k;
      count++;
    }
    System.out.println(count);
  }
} import java.util.Scanner; Scanner java.util public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    long n = sc.nextLong();
    long k = sc.nextLong();
    int count = 0;
    while(n > 0){
      n = n/k;
      count++;
    }
    System.out.println(count);
  }
} Main public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    long n = sc.nextLong();
    long k = sc.nextLong();
    int count = 0;
    while(n > 0){
      n = n/k;
      count++;
    }
    System.out.println(count);
  } main {
    Scanner sc = new Scanner(System.in);
    long n = sc.nextLong();
    long k = sc.nextLong();
    int count = 0;
    while(n > 0){
      n = n/k;
      count++;
    }
    System.out.println(count);
  } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) long n = sc.nextLong(); n sc.nextLong() sc.nextLong sc long k = sc.nextLong(); k sc.nextLong() sc.nextLong sc int count = 0; count 0 while(n > 0){
      n = n/k;
      count++;
    } n > 0 n 0 {
      n = n/k;
      count++;
    } n = n/k n n/k n k count++ count System.out.println(count) System.out.println System.out System System.out count String[] args args public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    long n = sc.nextLong();
    long k = sc.nextLong();
    int count = 0;
    while(n > 0){
      n = n/k;
      count++;
    }
    System.out.println(count);
  }
} public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    long n = sc.nextLong();
    long k = sc.nextLong();
    int count = 0;
    while(n > 0){
      n = n/k;
      count++;
    }
    System.out.println(count);
  }
} Main
import java.util.Scanner;
public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    long n = sc.nextLong();
    long k = sc.nextLong();
    int count = 0;
    while(n > 0){
      n = n/k;
      count++;
    }
    System.out.println(count);
  }
}
