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How to Solve Different Ways to Add Parentheses Problem
Master the Different Ways to Add Parentheses 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#241
LeetCode ProblemDifferent Ways to Add Parentheses
Given a string expression of numbers and operators, return all possible results from computing all the different possible ways to group numbers and operators. You may return the answer in any order. The test cases are generated such that the output values fit in a 32-bit integer and the number of different results does not exceed 104.
MathStringDynamic ProgrammingRecursionMemoization
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Problem Breakdown
Understanding the Different Ways to Add Parentheses Problem
Let's break down this LeetCode problem and understand what makes it challenging in interview settings.
Problem Statement
Given a string expression of numbers and operators, return all possible results from computing all the different possible ways to group numbers and operators. You may return the answer in any order. The test cases are generated such that the output values fit in a 32-bit integer and the number of different results does not exceed 104.
MediumProblem #241
LeetCodeDifferent Ways to Add Parentheses
Related Topics
MathStringDynamic ProgrammingRecursionMemoization
How Phantom Code Helps
Get real-time assistance for Different Ways to Add Parentheses problems during coding interviews. Phantom Code provides instant solutions and explanations.
Examples
# Example 1
Input
expression = "2-1-1"
Output
[0,2]
# Example 2
Input
expression = "2*3-4*5"
Output
[-34,-14,-10,-10,10]
Constraints
1 <= expression.length <= 20
expression consists of digits and the operator '+', '-', and '*'.
All the integer values in the input expression are in the range [0, 99].
The integer values in the input expression do not have a leading '-' or '+' denoting the sign.
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Solve Different Ways to Add Parentheses — Given a string expression of numbers and operators, return all possible results ...
Here's the optimal approach using Math:
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 Different Ways to Add Parentheses and using Phantom Code during coding interviews.
How does Phantom Code help me solve coding problems like Different Ways to Add Parentheses 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 Different Ways to Add Parentheses?
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 Different Ways to Add Parentheses?
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 Different Ways to Add Parentheses 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 Different Ways to Add Parentheses 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 Different Ways to Add Parentheses 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 Different Ways to Add Parentheses 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 Different Ways to Add Parentheses 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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