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How to Solve Minimum Time to Finish the Race Problem

Master the Minimum Time to Finish the Race LeetCode problem with undetectable real-time assistance. Get instant solutions and explanations during your coding interviews.

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Hard#2188

LeetCode Problem

Minimum Time to Finish the Race

You are given a 0-indexed 2D integer array tires where tires[i] = [fi, ri] indicates that the ith tire can finish its xth successive lap in fi * ri(x-1) seconds. You are also given an integer changeTime and an integer numLaps. The race consists of numLaps laps and you may start the race with any tire. You have an unlimited supply of each tire and after every lap, you may change to any given tire (including the current tire type) if you wait changeTime seconds. Return the minimum time to finish the race.

ArrayDynamic Programming

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Problem Breakdown

Understanding the Minimum Time to Finish the Race Problem

Let's break down this LeetCode problem and understand what makes it challenging in interview settings.

Problem Statement

HardProblem #2188

LeetCode

Minimum Time to Finish the Race

How Phantom Code Helps

Get real-time assistance for Minimum Time to Finish the Race problems during coding interviews. Phantom Code provides instant solutions and explanations.

Examples

# Example 1

Input

tires = [[2,3],[3,4]], changeTime = 5, numLaps = 4

Output

# Example 2

Input

tires = [[1,10],[2,2],[3,4]], changeTime = 6, numLaps = 5

Output

Constraints

1 <= tires.length <= 105

tires[i].length == 2

1 <= fi, changeTime <= 105

2 <= ri <= 105

1 <= numLaps <= 1000

How Phantom Code Helps with LeetCode Problems

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Solve Minimum Time to Finish the Race — You are given a 0-indexed 2D integer array tires where tires[i] = [fi, ri] indic...

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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Undetectability Checklist

Run compatibility test before interviews

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Supported

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HackerRank

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CodeSignal

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Undetectability and technical details

Our native desktop architecture avoids common detection vectors used by browser extensions. We provide a clear checklist so you can run basic checks and confirm the app will be invisible.

Platform compatibility and limitations

We work with Zoom, HackerRank, CodeSignal, CoderPad and other web-based platforms. Check the compatibility note and request a browser link if a specific desktop app is unsupported.

Frequently Asked Questions

Common questions about solving Minimum Time to Finish the Race and using Phantom Code during coding interviews.

How does Phantom Code help me solve coding problems like Minimum Time to Finish the Race 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 Minimum Time to Finish the Race?

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 Minimum Time to Finish the Race?

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 Minimum Time to Finish the Race 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 Minimum Time to Finish the Race 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 Minimum Time to Finish the Race 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 Minimum Time to Finish the Race 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 Minimum Time to Finish the Race 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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