valid-parentheses-1

Valid Parentheses

Write a function that takes a string of parentheses, and determines if the order of the parentheses is valid. The function should return true if the string is valid, and false if it's invalid.

Examples

"()"              =>  true
")(()))"          =>  false
"("               =>  false
"(())((()())())"  =>  true

Constraints

0 <= length of input <= 100

• All inputs will be strings, consisting only of characters ( and ).
• Empty strings are considered balanced (and therefore valid), and will be tested.
• For languages with mutable strings, the inputs should not be mutated.