import java.util.Scanner;
class Main{
public static void main(String[] args){
    Scanner scanner = new Scanner(System.in);
    int sc = scanner.nextInt();
    int sc2 = scanner.nextInt();
    String i = Integer.toString(sc,sc2);
    //System.out.println(i);
//    Integer oi = new Integer(sc);
//    int num1 = Integer.parseInt(sc, sc2);
    int valLen = i.length(); 
    System.out.println(valLen);
}
}
/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