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How to Solve Last Stone Weight II Problem
Master the Last Stone Weight II LeetCode problem with undetectable real-time assistance. Get instant solutions and explanations during your coding interviews.
Phantom Code generates complete solutions and debugging hints that you can use while explaining your approach, so you stay calm and in control.
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Start Free for WindowsMedium#1049
LeetCode ProblemLast Stone Weight II
You are given an array of integers stones where stones[i] is the weight of the ith stone. We are playing a game with the stones. On each turn, we choose any two stones and smash them together. Suppose the stones have weights x and y with x <= y. The result of this smash is: At the end of the game, there is at most one stone left. Return the smallest possible weight of the left stone. If there are no stones left, return 0.
ArrayDynamic Programming
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Problem Breakdown
Understanding the Last Stone Weight II Problem
Let's break down this LeetCode problem and understand what makes it challenging in interview settings.
Problem Statement
You are given an array of integers stones where stones[i] is the weight of the ith stone. We are playing a game with the stones. On each turn, we choose any two stones and smash them together. Suppose the stones have weights x and y with x <= y. The result of this smash is: At the end of the game, there is at most one stone left. Return the smallest possible weight of the left stone. If there are no stones left, return 0.
MediumProblem #1049
LeetCodeLast Stone Weight II
Related Topics
ArrayDynamic Programming
How Phantom Code Helps
Get real-time assistance for Last Stone Weight II problems during coding interviews. Phantom Code provides instant solutions and explanations.
Examples
# Example 1
Input
stones = [2,7,4,1,8,1]
Output
1
# Example 2
Input
stones = [31,26,33,21,40]
Output
5
Constraints
1 <= stones.length <= 30
1 <= stones[i] <= 100
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Solve Last Stone Weight II — You are given an array of integers stones where stones[i] is the weight of the i...
Here's the optimal approach using Array:
def solve(input):
# Optimal O(n) solution
return result
Time: O(n) | Space: O(n)
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Frequently Asked Questions
Common questions about solving Last Stone Weight II and using Phantom Code during coding interviews.
How does Phantom Code help me solve coding problems like Last Stone Weight II during interviews?
Phantom Code generates complete solutions instantly with proper complexity analysis, letting you focus on explaining your approach and demonstrating problem-solving skills rather than getting stuck on implementation details during high-pressure situations.
What if the interviewer asks follow-up questions or modifications to problems like Last Stone Weight II?
Phantom Code adapts in real-time. Screenshot the modified problem or use audio mode to capture the interviewer's follow-up, and get an updated solution within seconds — including edge cases and optimizations.
Can Phantom Code help me communicate my solution for problems like Last Stone Weight II?
Yes. Phantom Code provides step-by-step approach explanations with 3 progressive thoughts, so you can walk through your solution naturally. It also provides time and space complexity analysis to discuss trade-offs.
How does Phantom Code assist with different programming languages for Last Stone Weight II type problems?
Phantom Code supports 11 programming languages including Python, Java, C++, JavaScript, TypeScript, Go, Rust, Ruby, Swift, Kotlin, and C#. Set your preferred language and get idiomatic solutions.
What coding mistakes does Phantom Code help me avoid during Last Stone Weight II interviews?
Phantom Code catches common mistakes like off-by-one errors, missing edge cases, incorrect base conditions, and suboptimal approaches. It provides clean, well-structured code that handles all edge cases.
Is Phantom Code detectable when solving problems like Last Stone Weight II during live interviews?
No. Phantom Code runs as an invisible desktop overlay that doesn't appear in screen shares, recordings, or proctoring software. It works with Zoom, HackerRank, CodeSignal, CoderPad, and all major platforms.
How does Phantom Code help when I'm struggling with Last Stone Weight II style questions under pressure?
The AI provides structured guidance: first the approach (what algorithm/data structure to use and why), then the implementation with clean code, and finally complexity analysis. This helps you think clearly even under pressure.
Does Phantom Code work for the coding platforms used in Last Stone Weight II interviews?
Yes. Phantom Code works with all major coding platforms including LeetCode, HackerRank, CodeSignal, CoderPad, HackerEarth, and any browser-based coding environment.
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