82. Remove Duplicates from Sorted List II https://leetcode.com/problems/remove-duplicates-from-sorted-list-ii
264. Ugly Number II https://leetcode.com/problems/ugly-number-ii
378. Kth Smallest Element in a Sorted Matrix https://leetcode.com/problems/kth-smallest-element-in-a-sorted-matrix
373. Find K Pairs with Smallest Sums https://leetcode.com/problems/find-k-pairs-with-smallest-sums
2. Add Two Numbers https://leetcode.com/problems/add-two-numbers
445. Add Two Numbers II https://leetcode.com/problems/add-two-numbers-ii
Prerequisites
Before reading this article, you need to learn:
