theme changed

labs/lab3/IsLeapYear/Program.cs

@@ -0,0 +1,19 @@
+using System;
+
+public class Program
+{
+    public static void Main(string[] args)
+    {
+        Console.WriteLine("input a year: ");
+        int year = int.Parse(Console.ReadLine());
+
+        if ((year % 4 == 0 && year % 100 != 0) || (year % 400 == 0))
+        {
+            Console.WriteLine("YES");
+        }
+        else
+        {
+            Console.WriteLine("NO");
+        }
+    }
+}