
import java.io.DataInputStream;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.Collections;
import java.util.Scanner;
import java.util.TreeSet;

public class Main{
       
	public static void main(String[] args) {
		Scanner sdf = new Scanner(System.in);
		
                int t=1;
                while(t-->0){
                    int n=sdf.nextInt();
                    int k=sdf.nextInt();
                    if(n>1){
                    System.out.println((int)Math.ceil(Math.log(n)/Math.log(k)));
                    }
                    else System.out.println("1");
                    
                
                }                
        }
   


}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz