#include<iostream>
#include<fstream>
#include<locale>

   using namespace std;

#define SIZE_BUFFER     15 

#define n             array_value[0]         
#define m             array_value[1]
#define k             array_value[2]

int main()
{
	setlocale(LC_ALL,"russian");

	ifstream i_file("C:\\input.txt");
	ofstream o_file("C:\\output.txt");

	if(!i_file.is_open())
	{
		cerr<<"Файл input.txt не найден\n";
		
		   system("pause");

		return 0;
	}

	char* str_value = new char[SIZE_BUFFER];
	char* tmp;

	int array_value[3] = {0}; 
	int index = 0;

		i_file.getline(str_value,SIZE_BUFFER,'\n');

		tmp = strtok(str_value," ");

		   while(tmp != NULL)
		   {
			   array_value[index++] = atoi(tmp);
			   tmp = strtok(NULL," ");
		   }

		   cout<<"n = "<<n<<"\nm = "<<m<<"\nk = "<<k<<endl;

		   if(!(n >= 1 && m <= 150 && (k >= 1 || k <= 10000)))
		   {
                               cout<<"Условиe не выполняeтся:\n1 <= n,\nm <= 150, \n1 <= k <= 10 000\n";
			   
			       system("pause");

			   return 0;
		   }

		   int result = (n*m % k == 0) ? n*m / k : n*m / k + 1;

		   o_file<<result;

		i_file.close();
		o_file.close();

		   cin.get();

	return 0;
}