https://leetcode.com/problems/custom-sort-string/description/

Construct string from s using order #medium

https://leetcode.com/problems/remove-zero-sum-consecutive-nodes-from-linked-list/description/

Remove consequent 0-sum items from a LinkedList #medium

https://leetcode.com/problems/find-the-pivot-integer/description/

Pivot of 1..n where sum[1..p] == sum[p..n]. #easy

https://leetcode.com/problems/binary-subarrays-with-sum/description/

Count goal-sum subarrays in a 0-1 array #medium

https://leetcode.com/problems/product-of-array-except-self/description/

Array of suffix-prefix products #medium

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

Max length of subarray sum(0) == sum(1) #medium

https://leetcode.com/problems/insert-interval/description/

Insert interval into a sorted intervals array #medium

https://leetcode.com/problems/minimum-number-of-arrows-to-burst-balloons/description/

Count non-intersecting intervals #medium

https://leetcode.com/problems/task-scheduler/description/

Count CPU cycles if task can't run twice in n cycles #medium

https://leetcode.com/problems/merge-in-between-linked-lists/description/

Replace a segment in a LinkedList #medium

https://leetcode.com/problems/reverse-linked-list/description/

Reverse a Linked List #easy

https://leetcode.com/problems/palindrome-linked-list/description/

Is Linked List a palindrome #easy

https://leetcode.com/problems/reorder-list/description/

Reorder Linked List 1->2->3->4->5 -> 1->5->2->4->3 #medium

https://leetcode.com/problems/find-the-duplicate-number/description/

Duplicate single number in 1..n array, no extra memory #medium

https://leetcode.com/problems/find-all-duplicates-in-an-array/description/

All duplicate numbers of 1..n using O(1) memory #medium

https://leetcode.com/problems/first-missing-positive/description/

First number 1.. not presented in the array, O(1) space #hard

https://leetcode.com/problems/subarray-product-less-than-k/description/

Subarrays count with product less than k #medium

https://leetcode.com/problems/length-of-longest-subarray-with-at-most-k-frequency/description

Max subarray length with frequencies <= k #medium

https://leetcode.com/problems/count-subarrays-where-max-element-appears-at-least-k-times/description/

Count subarrays with at least k array max in #medium

https://leetcode.com/problems/subarrays-with-k-different-integers/description/

Count subarrays with k distinct numbers #hard

https://leetcode.com/problems/count-subarrays-with-fixed-bounds/description/

Count subarrays of range minK..maxK #hard