1 #include <iostream> 2 using namespace std; 3 4 int main() 5 { 6 int n, m, a; 7 long long ans, x, y; 8 cin >> n >> m >> a; 9 x = n/a; 10 y = m/a; 11 if(n%a!=0) x++; 12 if(m%a!=0) y++; 13 ans = x*y; 14 cout << ans << endl; 15 return 0; 16 }
原文：http://www.cnblogs.com/tony-/p/6718448.html
