import java.util.Scanner;

public class Main{
    public static void main(String[] args){
        // 変数宣言
        int n;
        int k;
        int result = 0;
        int temp;

        // 標準入力
        Scanner sc = new Scanner(System.in);
        n = sc.nextInt();
        k = sc.nextInt();
        sc.close();

        temp = n;

        // 演算処理
        for( int index=1; temp >= k ; index++ ){
            temp = temp / k ;
            result = index;
        }
        result++;

        // 出力結果
        System.out.println( result );

    }
}
/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