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Unity Editor with Inspector showing a player GameObject
LeetCode solution in a Python editor

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3880. Minimum Absolute Difference Between Two Values

We iterate from a nested-loop pair check to a single-pass scan that only remembers the most recent 1 and 2. The "last-s…

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3884. First Matching Character From Both Ends

We iterate from a full-string scan to a half-string walk by noticing the mirror-index symmetry between `s[i]` and `s[n …

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3927. Minimize Array Sum Using Divisible Replacements

We iterate from a brute-force pair check through a divisor sieve, then drop the constant factor with numpy. Inverting t…

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3894. Traffic Signal Color

We work through an if/elif ladder, then tighten the range checks using Python's chained-comparison syntax. The `a <= x …

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3898. Find the Degree of Each Vertex

We sum each row of the adjacency matrix to read off every vertex's degree in one pass. The row-sum-equals-degree identi…

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3903. Smallest Stable Index I

We iterate from a brute-force scan to a two-pass sweep that precomputes a right-min array and walks a running left-max.…

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