- Find the element that appears once in a sorted array
- Search in an almost sorted array
- Subsequences of String which Start with Vowel and End with Consonant
- Minimum steps to reach end of array under constraints
- Minimum steps to minimize n as per given condition
- All unique triplets that sum up to a given value
- Efficient search in an array where difference between adjacent is 1
- Number of turns to reach from one node to other in binary tree
- Sort linked list which is already sorted on absolute values
- Sort a linked list of 0s, 1s and 2s by changing links
- Search element in a sorted matrix
- Count negative numbers in a column wise and row wise sorted matrix
- Decode a string recursively encoded as count followed by substring
- Deletion in a Binary Tree
- Remove extra spaces from a string
- The painter’s partition problem using binary search
- Atleast two elements from array such that their GCD is 1 and cost is minimum
- Lexicographically smallest array after at-most K consecutive swaps
- Recursively remove all adjacent duplicates
- In-place replace multiple occurrences of a pattern
- Longest palindrome formed by removing or shuffling chars from string
- Check if string follows order of characters defined by a pattern or not
- Break a string into all possible combinations of non-overlapping substring
- Combinations of words formed by replacing given numbers with corresponding alphabets
- Length of the largest subarray with contiguous elements

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