"""Popping order must be correct. Check last element. Per their ASCII decimal values, open and closed parentheses and brackets are 1 or 2 positions away.""" ...
# find the length of the longest valid (well-formed) parentheses substring. # For "(()", the longest valid parentheses substring is "()", which has length = 2 ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback