A. Theatre Square 1000 / 水题

Posted 2021-09-26 幽殇默

https://codeforces.com/problemset/problem/1/A

#include<bits/stdc++.h>
using namespace std;
int main(void)
{
	long long int n,m,a; cin>>n>>m>>a;
	long long int cnt1=0,cnt2=0;
	cnt1=n/a;
	cnt2=m/a;
	if(n%a) cnt1++;
	if(m%a) cnt2++; 
	cout<<cnt1*cnt2<<endl;
	return 0;
}