import java.util.Scanner;
public class Main{
  public static void main(String... args){
    Scanner sc = new Scanner(System.in);

    int N = sc.nextInt();
    int K = sc.nextInt();

    int cnt = 0;
    while(N>0){
      N /= K;
      cnt++;
    }
    System.out.println(cnt);
  }
} 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();
    int K = sc.nextInt();

    int cnt = 0;
    while(N>0){
      N /= K;
      cnt++;
    }
    System.out.println(cnt);
  }
} Main public static void main(String... args){
    Scanner sc = new Scanner(System.in);

    int N = sc.nextInt();
    int K = sc.nextInt();

    int cnt = 0;
    while(N>0){
      N /= K;
      cnt++;
    }
    System.out.println(cnt);
  } main {
    Scanner sc = new Scanner(System.in);

    int N = sc.nextInt();
    int K = sc.nextInt();

    int cnt = 0;
    while(N>0){
      N /= K;
      cnt++;
    }
    System.out.println(cnt);
  } 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 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 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 cnt = 0;
    while(N>0){
      N /= K;
      cnt++;
    }
    System.out.println(cnt);
  }
} public class Main{
  public static void main(String... args){
    Scanner sc = new Scanner(System.in);

    int N = sc.nextInt();
    int K = sc.nextInt();

    int cnt = 0;
    while(N>0){
      N /= K;
      cnt++;
    }
    System.out.println(cnt);
  }
} Main
import java.util.Scanner;
public class Main{
  public static void main(String... args){
    Scanner sc = new Scanner(System.in);

    int N = sc.nextInt();
    int K = sc.nextInt();

    int cnt = 0;
    while(N>0){
      N /= K;
      cnt++;
    }
    System.out.println(cnt);
  }
}
