Valid Parentheses Explained with a Stack #Shorts

Valid Parentheses is a classic LeetCode stack problem. Opening brackets go onto a stack, and each closing bracket must match the most recent opening bracket.

This corrected version has full burned-in word captions and audible background music.

Python idea:
stack = []
pairs = {')': '(', ']': '[', '}': '{'}
for c in s:
if c in pairs.values():
stack.append(c)
elif not stack or stack.pop() != pairs[c]:
return False
return not stack

Time: O(n)
Space: O(n)

#leetcode #python #javascript #algorithms #programming #codinginterview #stack #shorts

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