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How to Solve Account Balance After Rounded Purchase Problem
Master the Account Balance After Rounded Purchase LeetCode problem with undetectable real-time assistance. Get instant solutions and explanations during your coding interviews.
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Start Free for WindowsEasy#2806
LeetCode ProblemAccount Balance After Rounded Purchase
Initially, you have a bank account balance of 100 dollars. You are given an integer purchaseAmount representing the amount you will spend on a purchase in dollars, in other words, its price. When making the purchase, first the purchaseAmount is rounded to the nearest multiple of 10. Let us call this value roundedAmount. Then, roundedAmount dollars are removed from your bank account. Return an integer denoting your final bank account balance after this purchase. Notes:
Math
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Problem Breakdown
Understanding the Account Balance After Rounded Purchase Problem
Let's break down this LeetCode problem and understand what makes it challenging in interview settings.
Problem Statement
Initially, you have a bank account balance of 100 dollars. You are given an integer purchaseAmount representing the amount you will spend on a purchase in dollars, in other words, its price. When making the purchase, first the purchaseAmount is rounded to the nearest multiple of 10. Let us call this value roundedAmount. Then, roundedAmount dollars are removed from your bank account. Return an integer denoting your final bank account balance after this purchase. Notes:
EasyProblem #2806
LeetCodeAccount Balance After Rounded Purchase
Related Topics
Math
How Phantom Code Helps
Get real-time assistance for Account Balance After Rounded Purchase problems during coding interviews. Phantom Code provides instant solutions and explanations.
Examples
# Example 1
Input
purchaseAmount = 9
Output
90
# Example 2
Input
purchaseAmount = 15
Output
80
# Example 3
Input
purchaseAmount = 10
Output
90
Constraints
0 <= purchaseAmount <= 100
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Solve Account Balance After Rounded Purchase — Initially, you have a bank account balance of 100 dollars. You are given an inte...
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 Account Balance After Rounded Purchase and using Phantom Code during coding interviews.
How does Phantom Code help me solve coding problems like Account Balance After Rounded Purchase 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 Account Balance After Rounded Purchase?
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 Account Balance After Rounded Purchase?
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 Account Balance After Rounded Purchase 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 Account Balance After Rounded Purchase 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 Account Balance After Rounded Purchase 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 Account Balance After Rounded Purchase 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 Account Balance After Rounded Purchase 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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