# Python2 - 37 bytes ```lang-py g=lambda x:(x%4or x%400and x%100<1)<1 ``` Note that if `a` is a nonnegative integer, then `a<1` is a short way of writing `not bool(a)`. The last `<1` thus effectively converts the expression in the parentheses to a boolean and negates the result. Applying the function `g` to an integer `n` between 1801 and 2400 will return `True` if `n` is a leap year, and `False` otherwise.