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 count = 1;
   while(true){
    if(n/(int)(Math.pow(k,count))==0) break;
    count++;
   }
   System.out.println(""+count);
 }
}
/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