import java.io.*;
import java.math.*;
import java.util.*;
public class Main {
 
	public static void main(String[] args) { 
		Scanner input = new Scanner(System.in);
		long H = input.nextLong();
		long A = input.nextLong();
		long ans = H/A;
		if (H%A!=0) 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