(
and closing )
gates, we need to:-1
if the gates are imbalanced.(
, push it onto the stack.)
, check if the stack is empty. If the stack is not empty, pop the stack (matching the opening gate with the closing gate).gates
is a string representing the sequence of gates (i.e., '('
for opening gates and ')'
for closing gates).'('
, we push it onto the stack.')'
, we check if there is a matching '('
in the stack. If so, we pop the stack and increment the valid_pairs
counter.')'
with no matching '('
, the gates are imbalanced, and we return -1
.-1
.gates = "()()"
'('
: Push to the stack.')'
: Pop from the stack, valid pair found, increment count.'('
: Push to the stack.')'
: Pop from the stack, valid pair found, increment count.2
gates = "(()"
'('
: Push to the stack.'('
: Push to the stack.')'
: Pop from the stack, valid pair found, increment count.-1
-1
to indicate an imbalance.SEO Keywords: Opening and closing gates validation, balanced parentheses, stack-based algorithm, water reservation system safety, string manipulation.Click here to know more our program!