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How to Solve Minimum Fuel Cost to Report to the Capital Problem
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Medium#2477
LeetCode ProblemMinimum Fuel Cost to Report to the Capital
There is a tree (i.e., a connected, undirected graph with no cycles) structure country network consisting of n cities numbered from 0 to n - 1 and exactly n - 1 roads. The capital city is city 0. You are given a 2D integer array roads where roads[i] = [ai, bi] denotes that there exists a bidirectional road connecting cities ai and bi. There is a meeting for the representatives of each city. The meeting is in the capital city. There is a car in each city. You are given an integer seats that indicates the number of seats in each car. A representative can use the car in their city to travel or change the car and ride with another representative. The cost of traveling between two cities is one liter of fuel. Return the minimum number of liters of fuel to reach the capital city.
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Problem Breakdown
Understanding the Minimum Fuel Cost to Report to the Capital Problem
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Problem Statement
There is a tree (i.e., a connected, undirected graph with no cycles) structure country network consisting of n cities numbered from 0 to n - 1 and exactly n - 1 roads. The capital city is city 0. You are given a 2D integer array roads where roads[i] = [ai, bi] denotes that there exists a bidirectional road connecting cities ai and bi. There is a meeting for the representatives of each city. The meeting is in the capital city. There is a car in each city. You are given an integer seats that indicates the number of seats in each car. A representative can use the car in their city to travel or change the car and ride with another representative. The cost of traveling between two cities is one liter of fuel. Return the minimum number of liters of fuel to reach the capital city.
MediumProblem #2477
LeetCodeMinimum Fuel Cost to Report to the Capital
Related Topics
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Examples
# Example 1
Input
roads = [[0,1],[0,2],[0,3]], seats = 5
Output
3
# Example 2
Input
roads = [[3,1],[3,2],[1,0],[0,4],[0,5],[4,6]], seats = 2
Output
7
# Example 3
Input
roads = [], seats = 1
Output
0
Constraints
1 <= n <= 105
roads.length == n - 1
roads[i].length == 2
0 <= ai, bi < n
ai != bi
roads represents a valid tree.
1 <= seats <= 105
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Solve Minimum Fuel Cost to Report to the Capital — There is a tree (i.e., a connected, undirected graph with no cycles) structure c...
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def solve(input):
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Time: O(n) | Space: O(n)
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Frequently Asked Questions
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How does Phantom Code AI help me solve coding problems like Minimum Fuel Cost to Report to the Capital during interviews?
Phantom Code AI 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 Fuel Cost to Report to the Capital?
Phantom Code AI 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 AI help me communicate my solution for problems like Minimum Fuel Cost to Report to the Capital?
Yes. Phantom Code AI 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 AI assist with different programming languages for Minimum Fuel Cost to Report to the Capital type problems?
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What coding mistakes does Phantom Code AI help me avoid during Minimum Fuel Cost to Report to the Capital interviews?
Phantom Code AI 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 AI detectable when solving problems like Minimum Fuel Cost to Report to the Capital during live interviews?
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How does Phantom Code AI help when I'm struggling with Minimum Fuel Cost to Report to the Capital 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 AI work for the coding platforms used in Minimum Fuel Cost to Report to the Capital interviews?
Yes. Phantom Code AI works with all major coding platforms including LeetCode, HackerRank, CodeSignal, CoderPad, HackerEarth, and any browser-based coding environment.
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