Date: 2026-06-06
Time: 17:13
largest-3-same-digit-number-in-string/solution.pyThis file solves LeetCode 2264: Largest 3-Same-Digit Number in String. It finds the lexicographically largest substring of length 3 where all three characters are the same digit (a "good integer"). The file follows the repo's standard pattern: one Solution class per problem directory.
Solution.splitandminimize — The method name is a misnomer (likely a copy-paste artifact from another problem). It actually implements largestGoodInteger from the LeetCode problem. The contract:
num: str — a string of digit characters, length >= 3str — the largest 3-same-digit substring (e.g. "999", "000"), or "" if none exists1. Initialize result to "" (the empty string acts as a sentinel — it compares less than any 3-digit string lexicographically).
2. Slide a window of size 3 across num via range(len(num) - 2).
3. At each position i, check if all three characters are equal: num[i] == num[i+1] == num[i+2].
4. If so, extract the candidate num[i:i+3] and keep it if it's lexicographically greater than the current result.
5. Return the best match, or "" if none was found.
"000" through "999"), Python's default string comparison (>) correctly orders them numerically. "999" > "777" > "000" > "".Solution class with one public method, matching LeetCode's expected interface (though the method name here doesn't match the LeetCode signature).test_solution.py in this same directory imports Solution. The massive "Imported By" list in the prompt is misleading — those are test files for *other* problems that happen to share the same from solution import Solution pattern. They don't import *this* file.range(len(num) - 2) guarantees i+2 < len(num), so the 3-char slice never goes out of bounds.result = "" ensures that any valid good integer will be accepted, since "000" > "" in Python.num, no side effects.None. The method assumes valid input per the LeetCode constraint (a string of digits with length >= 3). If given a string shorter than 3, range(len(num) - 2) produces an empty range and the method silently returns "".
The method is named splitandminimize, which is the name of a different LeetCode problem. This is a bug in the code generation pipeline — the logic is correct for "Largest 3-Same-Digit Number in String", but the method name doesn't match.
largest-3-same-digit-number-in-string/test_solution.py — See what test cases validate this solution and whether they reference the misnamed methodlargest-3-same-digit-number-in-string/review.md — Check if the code review caught the method naming issuecheck-if-string-is-decomposable-into-value-equal-substrings/solution.py:Solution — Related problem that also checks for runs of identical digits, uses a different decomposition strategymethod-naming-consistency — Whether other solutions in this repo also have method name mismatches from the code generation pipelineconsecutive-characters/solution.py — Another run-length / consecutive-character problem worth comparing approachesmisnamed-method — splitandminimize is the wrong method name for this problem; the LeetCode signature is largestGoodIntegerlexicographic-ordering-suffices — String comparison (>) correctly orders all possible good integers because they are same-length strings of identical digitsempty-string-sentinel — The initial result = "" is strictly less than any valid 3-digit candidate under Python string comparison, making it a correct "no match" sentinellinear-time-complexity — The solution runs in O(n) time with O(1) extra space, performing a single pass over the input stringshort-input-safe — Inputs shorter than 3 characters don't cause an error; the method returns "" via an empty loop range