Stack

16 problems tagged with Stack.

Easy (4)

Implement Queue using Stacks (LeetCode 232)

Qualcomm, Arista Networks, SAP...

Implement Two Stacks in One Array

Not Specified

Stack using Queue (LeetCode 225)

Nagarro, Qualcomm, Bloomberg...

Valid Parentheses (Leetcode 20)

Accolite, Autodesk, Bank of America...

Medium (5)

Min Stack (Leetcode 155)

Odoo, Paytm, UiPath...

Next Greater Element (NGE)

Not Specified

Previous Greater Element (PGE)

Not Specified

Remove Duplicate Letters / Smallest Subsequence of Distinct Characters (Leetcode 316 / 1081)

Expedia, FactSet, Increff...

Stock Span Problem (Leetcode 901)

Bloomberg, Microsoft, Amazon...

Hard (7)

Infix to Postfix (Shunting Yard Algorithm)

Not Specified

Infix to Prefix (Shunting Yard Variant)

Not Specified

Largest Rectangle in Histogram (leetcode 84)

Accenture, thoughtspot, Visa...

Maximal Rectangle (Leetcode 85) (largest rectangle with all 1's)

Zeta, Sprinklr, Google...

Postfix to Infix & Evaluation of Postfix (Leetcode 150)

Apollo.io, Canonical, Citigroup...

Prefix to Infix & Evaluation of Prefix

Not Specified

Trapping Rain Water (LC 42)

Amazon, Google, Microsoft...