[Init] Solved solutions

cpp/1A.cpp

@@ -0,0 +1,11 @@
+#include <iostream>
+
+using namespace std;
+
+int main()
+{
+    unsigned long long n, m, a;
+    cin >> n >> m >> a;
+    cout << ((n%a) ? (n/a + 1) : (n/a))*((m%a) ? (m/a + 1) : (m/a)) << endl;
+    return 0;
+}