You are given an integer n.
Return True if n is a perfect square (that is, n equals i * i for some non-negative integer i), and False otherwise.
A negative number is never a perfect square, so return False for any negative n. Note that 0 is a perfect square.
NOTE: This is a function-type question — you only write the function. Do not read input or print anything; a hidden checker calls your function and checks its return value.
Arguments
16
Returns
True