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How to Solve Maximize Amount After Two Days of Conversions Problem
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Medium#3387
LeetCode ProblemMaximize Amount After Two Days of Conversions
You are given a string initialCurrency, and you start with 1.0 of initialCurrency. You are also given four arrays with currency pairs (strings) and rates (real numbers): You can perform any number of conversions, including zero, using rates1 on day 1, followed by any number of additional conversions, including zero, using rates2 on day 2. Return the maximum amount of initialCurrency you can have after performing any number of conversions on both days in order. Note: Conversion rates are valid, and there will be no contradictions in the rates for either day. The rates for the days are independent of each other.
ArrayStringDepth-First SearchBreadth-First SearchGraph
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Problem Breakdown
Understanding the Maximize Amount After Two Days of Conversions Problem
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Problem Statement
You are given a string initialCurrency, and you start with 1.0 of initialCurrency. You are also given four arrays with currency pairs (strings) and rates (real numbers): You can perform any number of conversions, including zero, using rates1 on day 1, followed by any number of additional conversions, including zero, using rates2 on day 2. Return the maximum amount of initialCurrency you can have after performing any number of conversions on both days in order. Note: Conversion rates are valid, and there will be no contradictions in the rates for either day. The rates for the days are independent of each other.
MediumProblem #3387
LeetCodeMaximize Amount After Two Days of Conversions
Related Topics
ArrayStringDepth-First SearchBreadth-First SearchGraph
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Examples
# Example 1
Input
initialCurrency = "EUR", pairs1 = [["EUR","USD"],["USD","JPY"]], rates1 = [2.0,3.0], pairs2 = [["JPY","USD"],["USD","CHF"],["CHF","EUR"]], rates2 = [4.0,5.0,6.0]
Output
720.00000
# Example 2
Input
initialCurrency = "NGN", pairs1 = [["NGN","EUR"]] , rates1 = [9.0] , pairs2 = [["NGN","EUR"]] , rates2 = [6.0]
Output
1.50000
# Example 3
Input
initialCurrency = "USD", pairs1 = [["USD","EUR"]], rates1 = [1.0], pairs2 = [["EUR","JPY"]], rates2 = [10.0]
Output
1.00000
Constraints
1 <= initialCurrency.length <= 3
initialCurrency consists only of uppercase English letters.
1 <= n == pairs1.length <= 10
1 <= m == pairs2.length <= 10
pairs1[i] == [startCurrencyi, targetCurrencyi]
pairs2[i] == [startCurrencyi, targetCurrencyi]
1 <= startCurrencyi.length, targetCurrencyi.length <= 3
startCurrencyi and targetCurrencyi consist only of uppercase English letters.
rates1.length == n
rates2.length == m
1.0 <= rates1[i], rates2[i] <= 10.0
The input is generated such that there are no contradictions or cycles in the conversion graphs for either day.
The input is generated such that the output is at most 5 * 1010.
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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.
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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.
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