C :

#include<stdio.h>

void main(){
	int a,b;
	int x;
	scanf("%d%d",&a,&b);
	
	if(a%b==0){
		x=a/b;
	}else{
		x=a/b+1;
	}
	printf("%d",x);
}

C++ :

#include<bits/stdc++.h>
using namespace std;
int main(){
	int a,b,z;
	cin>>a>>b;
	if(a%b==0)z=a/b;
	else z=a/b+1;
	cout<<z<<endl;
	return 0;
}

Java :

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int g = sc.nextInt();
		int s;
		if(n % g == 0){
			s = n / g;
			System.out.println(s);
		}else if(n % g != 0){
			s = n / g + 1;
			System.out.println(s);
		}
		sc.close();
	}

}

Python :

# 接收两个输入
n = input().split()
# a表示总人数
a = int(n[0])
# b表示每个教室容纳人数
b = int(n[1])
if a % b == 0:
    c = a // b  # c表示所需教室数量
else:
    c = a // b + 1
print(c)