import java.util.*;
import java.util.Map.Entry;
 
class Main {
//	 static int mod =  (int) (Math.pow(10,9)+7);
//	 static int mod = 998244353;
   public static void main(String[] args) {
	   
       Scanner sc = new Scanner(System.in);
       int N = sc.nextInt();
       int K = sc.nextInt();
//       int B = sc.nextInt();
//       String S = sc.next();
//       String T = sc.next();
//       char[] s = S.toCharArray();
//       char[] t = T.toCharArray();
       
       int ans=0;
       while(N!=0) {
    	   N=N/K;
    	   ans++;
       }
       
       System.out.println(ans);
   }
      
}
/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