feat: add leap year

leap_year.py

@@ -0,0 +1,9 @@
+#!/usr/bin/env python3
+
+def is_leap_year(year):
+    return year % 4 == 0 and year % 100 != 0 or year % 400 == 0
+
+if __name__ == "__main__":
+    print(1582, is_leap_year(1582))
+    print(2000, is_leap_year(2000))
+    print(2100, is_leap_year(2100))