Conversation
|
Caution Review failedThe pull request is closed. WalkthroughRefactors the primary solution to a single-pass O(1) space implementation, adds multiple solution variants (naive, prefix/suffix, recursive, memoized, DP scaffold), centralizes test data in Changes
Estimated code review effort🎯 3 (Moderate) | ⏱️ ~25 minutes Possibly related PRs
Poem
🚥 Pre-merge checks | ✅ 4 | ❌ 2❌ Failed checks (2 warnings)
✅ Passed checks (4 passed)
✏️ Tip: You can configure your own custom pre-merge checks in the settings. ✨ Finishing touches
🧪 Generate unit tests (beta)
Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out. Comment |
yamcodes
changed the title
minimum-deletions space complexity to O(1)
yamcodes
changed the title
minimum-deletions space complexity to O(1)minimum-deletions-to-make-string-balanced space complexity to O(1)
![coderabbitai[bot]](https://avatars.githubusercontent.com/in/347564?s=60&v=4){kind=small}
There was a problem hiding this comment.
Actionable comments posted: 1
Caution
Some comments are outside the diff and can’t be posted inline due to platform limitations.
⚠️ Outside diff range comments (1)
README.md (1)
13-13:⚠️ Potential issue | 🟡 MinorUpdate README.md to reflect O(1) space complexity for problem 1653.
The
Solution.javanow correctly uses O(1) space (as shown in its Javadoc), but the solutions table still shows the staleO(n)value. Update line 13 in README.md to match.Proposed fix
-| 1653 | [Minimum Deletions to Make String Balanced](https://leetcode.com/problems/minimum-deletions-to-make-string-balanced/) | Medium | `O(n)` | `O(n)` | +| 1653 | [Minimum Deletions to Make String Balanced](https://leetcode.com/problems/minimum-deletions-to-make-string-balanced/) | Medium | `O(n)` | `O(1)` |
🤖 Fix all issues with AI agents
In
`@src/main/java/codes/yam/leetcode/minimumdeletionstomakestringbalanced/Solution.java`:
- Line 6: Update the Javadoc in Solution.java to stop claiming it "Optimizes
{`@code` SolutionDp}" since SolutionDp is unimplemented; edit the summary to
accurately describe the implemented algorithm (e.g., "Uses a
split-point/counting approach to compute minimum deletions in constant space")
or remove the DP reference, and ensure the Javadoc mentions the current approach
by name so readers are not misled by the unimplemented class {`@code` SolutionDp}
or the TODO in package-info.java.
🧹 Nitpick comments (4)
src/main/java/codes/yam/leetcode/minimumdeletionstomakestringbalanced/package-info.java (1)
26-31: Documentation contradicts itself about Solution's approach.Line 26 lists
Solutionas "Space-optimized DP, O(n) time, O(1) space" in the DP progression, but lines 29–31 state it currently uses a split-point approach and should later be replaced with the DP formulation. This is confusing for readers —Solutionappears in the DP progression list despite not being DP yet.Consider either removing
Solutionfrom the DP progression until it actually uses DP, or clarifying the current listing (e.g., placeholder entry marked as "planned").src/test/java/codes/yam/leetcode/minimumdeletionstomakestringbalanced/TestCases.java (1)
11-19: Consider adding edge cases for empty string and already-balanced inputs.The test suite covers a good variety of patterns but misses a few boundary cases:
""(empty → 0),"a"(single char → 0), and"ab"(already balanced → 0). These help catch off-by-one or empty-input issues.CLAUDE.md (1)
28-34: Add a language specifier to the fenced code block.Static analysis (markdownlint MD040) flags this code block as missing a language identifier. Adding
textor leaving it consistent with the other directory-tree block above would resolve the warning.Proposed fix
-``` +```text src/test/java/codes/yam/leetcode/{problemslug}/ ├── TestCases.java # Shared test data (static Stream<Arguments> cases()) ├── SolutionTest.java # Tests Solution.java ├── SolutionNaiveTest.java # Tests SolutionNaive.java (one test file per solution) └── SolutionDpTest.java -``` +```src/main/java/codes/yam/leetcode/minimumdeletionstomakestringbalanced/Solution.java (1)
20-35: The algorithm is correct but non-obvious — consider adding a brief explanatory comment.The split-point tracking logic with
aAfter,bBefore, and the reset condition is clever but not immediately intuitive. A short comment explaining the invariant (e.g., "track the cost of the best split point seen so far; reset when deleting all b's becomes cheaper") would help future readers.
src/main/java/codes/yam/leetcode/minimumdeletionstomakestringbalanced/Solution.java
Outdated
Show resolved
Hide resolved
yamcodes
deleted the
18-improve-minimum-deletions-space-complexity-to-o1
branch
1 participant
Closes #18
Summary by CodeRabbit