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Previous Year Questions

Reverse Linked List

Valid Palindrome

Generate Parentheses

Valid Parentheses

Merge k Sorted Lists

Zigzag Iterator

String Compression

Subarray Sum Equals K

Merge Intervals

Max Consecutive Ones III

Validate Binary Search Tree

Insert Delete GetRandom O(1)

Implement Queue using Stacks

Permutation in String

Max Consecutive Ones II

Merge Two Sorted Lists

Spiral Matrix II

Longest Substring Without Repeating Characters

Trapping Rain Water

Add Two Numbers

Merge Sorted Array

Reconstruct Itinerary

Number of Recent Calls

Median of Two Sorted Arrays

Subarray Sums Divisible by K

Longest Palindromic Substring

Serialize and Deserialize BST

Search in Rotated Sorted Array

Remove Nth Node From End of List

Evaluate Reverse Polish Notation

Intersection of Two Arrays II

Find First and Last Position of Element in Sorted Array

Perfect Squares

Implement strStr()

Longest Subarray of 1's After Deleting One Element

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