Coding Interviews

Invalid Transactions (Leetcode 1169)

Validate Binary Tree Nodes (Leetcode 1361)

Cinema Seat Allocation (Leetcode 1386)

Sort the Matrix Diagonally (Leetcode 1329)

Number of Sub-arrays With Odd Sum (Leetcode 1524)

Reveal Cards In Increasing Order (Leetcode 950)

Decrypt String from Alphabet to Integer Mapping (Leetcode 1309)

Path In Zigzag Labelled Binary Tree (Leetcode 1104)

Gray Code (Leetcode 89)

Least Number of Unique Integers after K Removals (Leetcode 1481)

Four Divisors (Leetcode 1390)

Time Needed to Inform All Employees (Leetcode 1376)

Reduction Operations to Make the Array Elements Equal (Leetcode 1887)

Sum of Absolute Differences in a Sorted Array (Leetcode 1685)

Word Search II (Leetcode 212)

Search Insert Position (Leetcode 35)

Range Sum of Sorted Subarray Sums (Leetcode 1508)

Design a Stack With Increment Operation (Leetcode 1381)

Is Subsequence (Leetcode 392)

Consecutive Characters (Leetcode 1446)

All Paths From Source to Target (Leetcode 797)

Complete Binary Tree Inserter (Leetcode 919)

Insert Delete GetRandom O(1) - Duplicates allowed (Leetcode 381)

Reduce Array Size to The Half (Leetcode 1338)

Number Complement (Leetcode 476)

Replace Elements with Greatest Element on Right Side (Leetcode 1299)

Kth Smallest Element in a BST (Leetcode 230)

Shuffle the Array (Leetcode 1470)

The kth Factor of n (Leetcode 1492)

Hamming Distance (Leetcode 461)

Swapping Nodes in a Linked List (Leetcode 1721)