LeetCode Wiki Contributions

🎠 SkyHorse Rideshare

After establishing SkyHorse in May 2026, which contains my $O(n)$ double stacks method for LeetCode No.2454, I suddenly remembered that, in November 2024, I actually already posted the same method in the Discussions section of a public repo.

🧘🏻‍♀️ Active Sharing Mindset

LeetCode Wiki has activity and size that let me realize: “why not share some different style AC methods into public community?”

Coincidentally, I found myself having some hard problems’ solutions which weren’t in LeetCode Wiki at that time, so everything started at elevating solution of No.2454 from Discussions into PR.

In one month, I had 8 solution code & tutorials merged into LeetCode Wiki.

My Merged PRs Compared To LeetCode Wiki Original Solutions

Efficiency Enhancement: 3

• No.2454 Next Greater Element IV: achieved $O(n)$ time by double stacks, reducing from global sorting and ordered set of $O(nlogn)$ time.

• No.3430 Maximum and Minimum Sums of at Most Size K Subarrays: delivered the repo’s first tutorial for No.3430, achieving both time and space complexities at $O(n)$ via deques.

• No.1793 Maximum Score of a Good Subarray: optimized $O(1)$ space with greedy two pointers, reducing from stack’s $O(n)$ space.

Different Style Same Efficiency: 4

• No.768 Max Chunks To Make Sorted II: wrote $O(n)$ time method by prefix max & suffix min, complementing original solution of $O(n)$ stack.

• No.315 Count of Smaller Numbers After Self: provided $O(nlogn)$ time answer by merge sort, offering a more implementation-friendly data structure to complement original solutions’ $O(nlogn)$ segment tree and Fenwick tree.

• No.2736. Maximum Sum Queries: gave $O(nlogn)$ time complexity with sorting, stack and binary search, complementing original solution’s $O(nlogn)$ Fenwick tree.

• No.987. Vertical Order Traversal of a Binary Tree: submitted $O(nlogn)$ time answer of BFS + sorting, avoiding recursions while complementing original solution’s $O(nlogn)$ DFS + sorting.

‍😁️ Still Prefer SkyHorse

Because there aren’t any wording formats to follow. Styles in SkyHorse are more entertaining~~