https://leetcode.com/problems/largest-substring-between-two-equal-characters/description/

Max distance between same chars in string.

https://leetcode.com/problems/assign-cookies/description/

Max count of greedy children g[Int] to assign cookies with sizes s[Int].

https://leetcode.com/problems/convert-an-array-into-a-2d-array-with-conditions/description/

Convert numbers array into array of unique number-rows.

https://leetcode.com/problems/number-of-laser-beams-in-a-bank/description/

Beams count between consequent non-empty row's `1`s.

https://leetcode.com/problems/minimum-number-of-operations-to-make-array-empty/description/

Minimum pairs or triples duplicate removal operations to empty array of numbers.

https://leetcode.com/problems/longest-increasing-subsequence/description/

Longest increasing subsequence length.

https://leetcode.com/problems/maximum-profit-in-job-scheduling/description/

Max profit in non-intersecting jobs given startTime[], endTime[] and profit[].

https://leetcode.com/problems/arithmetic-slices-ii-subsequence/description/

Count of arithmetic subsequences.

https://leetcode.com/problems/range-sum-of-bst/description/

Sum of BST in range [low..high].

https://leetcode.com/problems/amount-of-time-for-binary-tree-to-be-infected/description/

Max distance from node in a Binary Tree.

https://leetcode.com/problems/maximum-difference-between-node-and-ancestor/description/

Max diff between node and ancestor in a binary tree.

https://leetcode.com/problems/determine-if-string-halves-are-alike/description/

Are aeiouAEIOU count the same in the two halves of string.

https://leetcode.com/problems/minimum-number-of-steps-to-make-two-strings-anagram/description/

Min operations to make string t anagram of s.

https://leetcode.com/problems/determine-if-two-strings-are-close/description/

Are strings convertible by swapping existing chars positions or frequencies.

https://leetcode.com/problems/find-players-with-zero-or-one-losses/description/

[sorted winners list, sorted single lose list]

https://leetcode.com/problems/insert-delete-getrandom-o1/description/

Implement HashSet<Int> with random method.

https://leetcode.com/problems/unique-number-of-occurrences/description/

Are array frequencies unique.

https://leetcode.com/problems/climbing-stairs/description/

Ways to climb n stairs by 1 or 2 steps.

https://leetcode.com/problems/minimum-falling-path-sum/description/

Min sum moving bottom center, left, right in 2D matrix.