https://leetcode.com/problems/number-of-atoms/description/

Simplify chemical formula parenthesis #hard #stack

https://leetcode.com/problems/create-binary-tree-from-descriptions/description/

Restore binary tree from [parent, child, isLeft] #medium

https://leetcode.com/problems/step-by-step-directions-from-a-binary-tree-node-to-another/description/

U-L-R path from s to d in a Binary Tree #medium #tree

https://leetcode.com/problems/delete-nodes-and-return-forest/description/

Trees after remove nodes from tree #medium #tree

https://leetcode.com/problems/number-of-good-leaf-nodes-pairs/description/

Count at most distance paths between leafs #medium #tree

https://leetcode.com/problems/lucky-numbers-in-a-matrix/description/

Min in rows and max in columns in a unique number matrix #easy

https://leetcode.com/problems/find-valid-matrix-given-row-and-column-sums/description/

Matrix from rows and cols sums #medium

https://leetcode.com/problems/build-a-matrix-with-conditions/description/

Build a matrix from a graph conditions #hard #graph #toposort

https://leetcode.com/problems/sort-the-people/description/

Sort one array by another #easy

https://leetcode.com/problems/sort-array-by-increasing-frequency/description/

Sort by frequency or descending #easy

https://leetcode.com/problems/sort-the-jumbled-numbers/description/

Sort array by digits mapping #medium

https://leetcode.com/problems/sort-an-array/description/

Sort array using minimum memory #medium

https://leetcode.com/problems/find-the-city-with-the-smallest-number-of-neighbors-at-a-threshold-distance/description/

Node with minimum neighbours by distanceThreshold #medium #bfs #FloydWarshall

https://leetcode.com/problems/minimum-cost-to-convert-string-i/description/

Min cost to change source to target #medium #FloydWarshall

https://leetcode.com/problems/second-minimum-time-to-reach-destination/description/

Second min time to travel from 1 to n in time-edged graph stopping every change seconds #hard #graph #bfs

https://leetcode.com/problems/count-number-of-teams/description/

Count increasing or decreasing (i, j, k) #medium

https://leetcode.com/problems/minimum-deletions-to-make-string-balanced/description/

Min removals to sort 'ab' string #medium

https://leetcode.com/problems/filling-bookcase-shelves/description/

Min total height to split [[w,h]] array by shelfWidth #medium #dynamic_programming

Who else got this today?

https://leetcode.com/problems/number-of-senior-citizens/description/

Count filtered by a substring #easy

https://leetcode.com/problems/minimum-swaps-to-group-all-1s-together-ii/description/

Min swaps to make a circular [01] array #medium #sliding_window