import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        long N = sc.nextLong();
        int K = sc.nextInt();
        int count = 1;
        while (N >= K) {
            //System.out.println(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();
        int K = sc.nextInt();
        int count = 1;
        while (N >= K) {
            //System.out.println(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();
        int K = sc.nextInt();
        int count = 1;
        while (N >= K) {
            //System.out.println(N);
            N /= K;            
            count++;
        }
        System.out.println(count);
    } main {
        Scanner sc = new Scanner(System.in);
        long N = sc.nextLong();
        int K = sc.nextInt();
        int count = 1;
        while (N >= K) {
            //System.out.println(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 int K = sc.nextInt(); K sc.nextInt() sc.nextInt sc int count = 1; count 1 while (N >= K) {
            //System.out.println(N);
            N /= K;            
            count++;
        } N >= K N K {
            //System.out.println(N);
            N /= K;            
            count++;
        } 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();
        int K = sc.nextInt();
        int count = 1;
        while (N >= K) {
            //System.out.println(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();
        int K = sc.nextInt();
        int count = 1;
        while (N >= K) {
            //System.out.println(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();
        int K = sc.nextInt();
        int count = 1;
        while (N >= K) {
            //System.out.println(N);
            N /= K;            
            count++;
        }
        System.out.println(count);
    }
}