[Init] Solved solutions

cs/1A.cs

@@ -0,0 +1,36 @@
+using System;
+
+namespace problem_1A
+{
+    class problem_1A
+    {
+		static void Main(string[] args)
+		{
+			string s = Console.ReadLine();
+			string[] input = s.Split(' ');
+			long m = Convert.ToInt32(input[0]);
+			long n = Convert.ToInt32(input[1]);
+			long a = Convert.ToInt32(input[2]);
+			if (a != 0)
+			{
+				if (m % a == 0)
+				{
+					m /= a;
+				}
+				else
+				{
+					m = m / a + 1;
+				}
+				if (n % a == 0)
+				{
+					n /= a;
+				}
+				else
+				{
+					n = n / a + 1;
+				}
+			}
+			Console.WriteLine(m * n);
+		}
+	}
+}