https://leetcode.com/problems/patching-array/description/

Insertions to make subsets sums fill 1..n #hard

https://leetcode.com/problems/sum-of-square-numbers/description/

Is c sum of squares? #medium #binary_search

https://leetcode.com/problems/most-profit-assigning-work/description/

Max profit by assigning [profit, difficulty] to workers any times #medium #sorting #greedy

https://leetcode.com/problems/minimum-number-of-days-to-make-m-bouquets/description/

Min days to take m k-subarrays #medium #binary_search

https://leetcode.com/problems/magnetic-force-between-two-balls/description/

Max shortest distance between m positions #medium #binary_search

https://leetcode.com/problems/grumpy-bookstore-owner/description/

Max customers sum after make consecutive minutes non-grumpy #medium #sliding_window

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

Count subarrays with k odds #medium #sliding_window

https://leetcode.com/problems/longest-continuous-subarray-with-absolute-diff-less-than-or-equal-to-limit/description/

Longest subarray with abs(a[i] - a[j]) <= limit #medium #sliding_window #monotonic_queue

https://leetcode.com/problems/minimum-number-of-k-consecutive-bit-flips/description/

Count k-range flips in binary array to make all 1 #hard #sliding_window

https://leetcode.com/problems/binary-search-tree-to-greater-sum-tree/description/

Aggregate Binary Search Tree from the right #medium #tree

https://leetcode.com/problems/find-center-of-star-graph/description/

Center of a start graph #easy

https://leetcode.com/problems/maximum-total-importance-of-roads/description/

Sort graph by siblings and compute sum(i*s) #medium

https://leetcode.com/problems/all-ancestors-of-a-node-in-a-directed-acyclic-graph/description/

List of ancestors in a DAG #medium #dfs #toposort

https://leetcode.com/problems/remove-max-number-of-edges-to-keep-graph-fully-traversable/description/

Remove extra nodes in a connected graph by type 1, 2 and 3=1+2 #hard #union-find

https://leetcode.com/problems/three-consecutive-odds/description/

Has window of 3 odds? #easy

https://leetcode.com/problems/intersection-of-two-arrays-ii/description/

Array intersection with duplicates #easy

https://leetcode.com/problems/minimum-difference-between-largest-and-smallest-value-in-three-moves/description/

Min difference after 3 changes in array #medium #sliding_window #dynamic_programming

https://leetcode.com/problems/merge-nodes-in-between-zeros/description/

Collapse in-between 0 nodes in a LinkedList #medium #linked_list

https://leetcode.com/problems/find-the-minimum-and-maximum-number-of-nodes-between-critical-points/description/

[min, max] distance between critical points in linked list #medium #linked_list

https://leetcode.com/problems/pass-the-pillow/description/

Loop position in increasing-decreasing array #easy #math #simulation