seassion-003: easy sets of profit and duplicate#123
Conversation
|
Warning Review limit reached
More reviews will be available in 55 minutes and 56 seconds. Learn how PR review limits work. Your organization has run out of usage credits. Purchase more in the billing tab. ⌛ How to resolve this issue?After more reviews become available, a review can be triggered using the We recommend that you space out your commits to avoid hitting the rate limit. 🚦 How do rate limits work?CodeRabbit enforces hourly rate limits for each developer per organization. Our paid plans include higher PR review limits than trial, open-source, and free plans. In all cases, reviews become available again over time. During sustained high-volume PR review activity, CodeRabbit may temporarily slow when the next review becomes available. Please see our Fair Usage Limits Policy for further information. ℹ️ Review info⚙️ Run configurationConfiguration used: defaults Review profile: CHILL Plan: Pro Run ID: 📒 Files selected for processing (1)
📝 WalkthroughWalkthroughAdds three LeetCode solutions: containsDuplicate (set-based duplicate detection), maxProfit (single-pass min-price/max-profit), and productExceptSelf (prefix/postfix product composition). ChangesLeetCode Solutions
Estimated code review effort🎯 3 (Moderate) | ⏱️ ~20 minutes Poem
🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ 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 |
![coderabbitai[bot]](https://avatars.githubusercontent.com/in/347564?s=60&v=4){kind=small}
There was a problem hiding this comment.
Actionable comments posted: 2
🤖 Prompt for all review comments with AI agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.
Inline comments:
In `@LeetCode/easy/max_profit_121.py`:
- Line 6: The code initializes profit and cheapest_price with "profit,
cheapest_price = 0, prices[0]" which will raise IndexError for an empty prices
list; update the start of the max_profit function to handle the empty-input edge
case by either returning 0 immediately when not prices (early return) or by
initializing cheapest_price to float('inf') instead of prices[0] so the loop
works safely for empty or non-empty lists; modify references in the function
(profit, cheapest_price, and the main loop) accordingly.
- Around line 1-12: You have two copies of the same optimized implementation
(Solution.maxProfit) which duplicates maintenance; remove or refactor the
duplicate by keeping the canonical implementation that also contains
Solution.bruteForceMaxProfit (retain its file) and either delete this file or
replace its body with a simple import that re-exports the canonical
Solution.maxProfit; locate the duplicated method named Solution.maxProfit here
and the canonical Solution.maxProfit and Solution.bruteForceMaxProfit in the
other module, then update imports/exports so callers use only the canonical
implementation.
🪄 Autofix (Beta)
Fix all unresolved CodeRabbit comments on this PR:
- Push a commit to this branch (recommended)
- Create a new PR with the fixes
ℹ️ Review info
⚙️ Run configuration
Configuration used: defaults
Review profile: CHILL
Plan: Pro
Run ID: 85d6eb06-f67d-4f02-8ff1-0e2ee32c07c9
📒 Files selected for processing (2)
LeetCode/easy/contains_duplicate_217.pyLeetCode/easy/max_profit_121.py
| from typing import List | ||
|
|
||
|
|
||
| class Solution: | ||
| def maxProfit(self, prices: List[int]) -> int: | ||
| profit, cheapest_price = 0, prices[0] | ||
| for price in prices: | ||
| if price < cheapest_price: | ||
| cheapest_price = price | ||
| profit = max(profit, price - cheapest_price) | ||
|
|
||
| return profit |
There was a problem hiding this comment.
🧩 Analysis chain
🏁 Script executed:
#!/bin/bash
# Description: Check for other solution files for problem 121
# Search for files containing "121" in the LeetCode/easy directory
fd -e py "121" LeetCode/easy/
# Check the content and compare implementations
rg -n "def maxProfit" LeetCode/easy/ --type py -C 10Repository: WazedKhan/Problems
Length of output: 2555
🏁 Script executed:
#!/bin/bash
set -euo pipefail
# Inspect the other candidate file to compare implementations
echo "=== best_time_buy_sell_stock_121.py (relevant sections) ==="
nl -ba LeetCode/easy/best_time_buy_sell_stock_121.py | sed -n '1,220p'
echo "=== max_profit_121.py (entire file) ==="
nl -ba LeetCode/easy/max_profit_121.py | sed -n '1,160p'
# Check for any other 121-related python files in the directory
echo "=== other *121*.py files in LeetCode/easy ==="
fd -e py "121" LeetCode/easy/ | sortRepository: WazedKhan/Problems
Length of output: 183
🏁 Script executed:
#!/bin/bash
set -euo pipefail
echo "=== Line counts ==="
wc -l LeetCode/easy/best_time_buy_sell_stock_121.py LeetCode/easy/max_profit_121.py
echo "=== rg locations for maxProfit/bruteForceMaxProfit ==="
rg -n "def (bruteForceMaxProfit|maxProfit)" LeetCode/easy/best_time_buy_sell_stock_121.py
rg -n "def maxProfit" LeetCode/easy/max_profit_121.py
echo "=== best_time_buy_sell_stock_121.py (show class + methods area) ==="
# Show around the first maxProfit definition and brute force method.
sed -n '1,120p' LeetCode/easy/best_time_buy_sell_stock_121.py
sed -n '120,220p' LeetCode/easy/best_time_buy_sell_stock_121.py
echo "=== max_profit_121.py ==="
cat -n LeetCode/easy/max_profit_121.py
echo "=== other *121*.py files in LeetCode/easy ==="
fd -e py "121" LeetCode/easy/ | sortRepository: WazedKhan/Problems
Length of output: 3587
Consolidate duplicate LeetCode 121 solution files
LeetCode/easy/best_time_buy_sell_stock_121.pyalready containsSolution.maxProfit(optimized) alongsideSolution.bruteForceMaxProfit.LeetCode/easy/max_profit_121.pyre-implements the same optimizedmaxProfitlogic, creating duplicate maintenance.
Recommend keeping one canonical file (likelybest_time_buy_sell_stock_121.py) and removing/refactoring the other to avoid maintaining two copies of the same algorithm.
🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.
In `@LeetCode/easy/max_profit_121.py` around lines 1 - 12, You have two copies of
the same optimized implementation (Solution.maxProfit) which duplicates
maintenance; remove or refactor the duplicate by keeping the canonical
implementation that also contains Solution.bruteForceMaxProfit (retain its file)
and either delete this file or replace its body with a simple import that
re-exports the canonical Solution.maxProfit; locate the duplicated method named
Solution.maxProfit here and the canonical Solution.maxProfit and
Solution.bruteForceMaxProfit in the other module, then update imports/exports so
callers use only the canonical implementation.
|
|
||
| class Solution: | ||
| def maxProfit(self, prices: List[int]) -> int: | ||
| profit, cheapest_price = 0, prices[0] |
There was a problem hiding this comment.
Add validation for empty prices list.
Accessing prices[0] without validation will raise an IndexError if the input list is empty. This would cause a runtime crash.
🛡️ Proposed fix options
Option 1: Add early return for edge case
def maxProfit(self, prices: List[int]) -> int:
+ if not prices:
+ return 0
profit, cheapest_price = 0, prices[0]Option 2: Use float('inf') initialization (matches reference implementation)
- profit, cheapest_price = 0, prices[0]
+ cheapest_price = float('inf')
+ profit = 0
for price in prices:
if price < cheapest_price:
cheapest_price = price
profit = max(profit, price - cheapest_price)🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.
In `@LeetCode/easy/max_profit_121.py` at line 6, The code initializes profit and
cheapest_price with "profit, cheapest_price = 0, prices[0]" which will raise
IndexError for an empty prices list; update the start of the max_profit function
to handle the empty-input edge case by either returning 0 immediately when not
prices (early return) or by initializing cheapest_price to float('inf') instead
of prices[0] so the loop works safely for empty or non-empty lists; modify
references in the function (profit, cheapest_price, and the main loop)
accordingly.
1 participant
Summary by CodeRabbit