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Valid Parentheses Given a string s containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid.

Leetcode #3832.

Leetcode #3828 (Could not solve on my own - come back to review later)

880. Decoded String at Index (LeetCode) Helpful? Please use the *Thanks* button above! Or, thank me via Patreon: ...

Leetcode #385.

Leetcode #1390.

Leetcode #3835 | Contest #488 Q3.