mirror of
https://gitee.com/coder-xiaomo/leetcode-problemset
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192 lines
25 KiB
JSON
192 lines
25 KiB
JSON
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"data": {
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"question": {
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"questionId": "3613",
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"questionFrontendId": "3387",
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"title": "Maximize Amount After Two Days of Conversions",
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"content": "<p>You are given a string <code>initialCurrency</code>, and you start with <code>1.0</code> of <code>initialCurrency</code>.</p>\n\n<p>You are also given four arrays with currency pairs (strings) and rates (real numbers):</p>\n\n<ul>\n\t<li><code>pairs1[i] = [startCurrency<sub>i</sub>, targetCurrency<sub>i</sub>]</code> denotes that you can convert from <code>startCurrency<sub>i</sub></code> to <code>targetCurrency<sub>i</sub></code> at a rate of <code>rates1[i]</code> on <strong>day 1</strong>.</li>\n\t<li><code>pairs2[i] = [startCurrency<sub>i</sub>, targetCurrency<sub>i</sub>]</code> denotes that you can convert from <code>startCurrency<sub>i</sub></code> to <code>targetCurrency<sub>i</sub></code> at a rate of <code>rates2[i]</code> on <strong>day 2</strong>.</li>\n\t<li>Also, each <code>targetCurrency</code> can be converted back to its corresponding <code>startCurrency</code> at a rate of <code>1 / rate</code>.</li>\n</ul>\n\n<p>You can perform <strong>any</strong> number of conversions, <strong>including zero</strong>, using <code>rates1</code> on day 1, <strong>followed</strong> by any number of additional conversions, <strong>including zero</strong>, using <code>rates2</code> on day 2.</p>\n\n<p>Return the <strong>maximum</strong> amount of <code>initialCurrency</code> you can have after performing any number of conversions on both days <strong>in order</strong>.</p>\n\n<p><strong>Note: </strong>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.</p>\n\n<p> </p>\n<p><strong class=\"example\">Example 1:</strong></p>\n\n<div class=\"example-block\">\n<p><strong>Input:</strong> <span class=\"example-io\">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]</span></p>\n\n<p><strong>Output:</strong> <span class=\"example-io\">720.00000</span></p>\n\n<p><strong>Explanation:</strong></p>\n\n<p>To get the maximum amount of <strong>EUR</strong>, starting with 1.0 <strong>EUR</strong>:</p>\n\n<ul>\n\t<li>On Day 1:\n\t<ul>\n\t\t<li>Convert <strong>EUR </strong>to <strong>USD</strong> to get 2.0 <strong>USD</strong>.</li>\n\t\t<li>Convert <strong>USD</strong> to <strong>JPY</strong> to get 6.0 <strong>JPY</strong>.</li>\n\t</ul>\n\t</li>\n\t<li>On Day 2:\n\t<ul>\n\t\t<li>Convert <strong>JPY</strong> to <strong>USD</strong> to get 24.0 <strong>USD</strong>.</li>\n\t\t<li>Convert <strong>USD</strong> to <strong>CHF</strong> to get 120.0 <strong>CHF</strong>.</li>\n\t\t<li>Finally, convert <strong>CHF</strong> to <strong>EUR</strong> to get 720.0 <strong>EUR</strong>.</li>\n\t</ul>\n\t</li>\n</ul>\n</div>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n\n<div class=\"example-block\">\n<p><strong>Input:</strong> <span class=\"example-io\">initialCurrency = "NGN", pairs1 = </span>[["NGN","EUR"]]<span class=\"example-io\">, rates1 = </span>[9.0]<span class=\"example-io\">, pairs2 = </span>[["NGN","EUR"]]<span class=\"example-io\">, rates2 = </span>[6.0]</p>\n\n<p><strong>Output:</strong> 1.50000</p>\n\n<p><strong>Explanation:</strong></p>\n\n<p>Converting <strong>NGN</strong> to <strong>EUR</strong> on day 1 and <strong>EUR</strong> to <strong>NGN</strong> using the inverse rate on day 2 gives the maximum amount.</p>\n</div>\n\n<p><strong class=\"example\">Example 3:</strong></p>\n\n<div class=\"example-block\">\n<p><strong>Input:</strong> <span class=\"example-io\">initialCurrency = "USD", pairs1 = [["USD","EUR"]], rates1 = [1.0], pairs2 = [["EUR","JPY"]], rates2 = [10.0]</span></p>\n\n<p><strong>Output:</strong> <span class=\"example-io\">1.00000</span></p>\n\n<p><strong>Explanation:</strong></p>\n\n<p>In this example, there is no need to make any conversions on either day.</p>\n</div
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"exampleTestcases": "\"EUR\"\n[[\"EUR\",\"USD\"],[\"USD\",\"JPY\"]]\n[2.0,3.0]\n[[\"JPY\",\"USD\"],[\"USD\",\"CHF\"],[\"CHF\",\"EUR\"]]\n[4.0,5.0,6.0]\n\"NGN\"\n[[\"NGN\",\"EUR\"]]\n[9.0]\n[[\"NGN\",\"EUR\"]]\n[6.0]\n\"USD\"\n[[\"USD\",\"EUR\"]]\n[1.0]\n[[\"EUR\",\"JPY\"]]\n[10.0]",
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"code": "class Solution {\npublic:\n double maxAmount(string initialCurrency, vector<vector<string>>& pairs1, vector<double>& rates1, vector<vector<string>>& pairs2, vector<double>& rates2) {\n \n }\n};",
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"code": "class Solution {\n public double maxAmount(String initialCurrency, List<List<String>> pairs1, double[] rates1, List<List<String>> pairs2, double[] rates2) {\n \n }\n}",
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"code": "class Solution(object):\n def maxAmount(self, initialCurrency, pairs1, rates1, pairs2, rates2):\n \"\"\"\n :type initialCurrency: str\n :type pairs1: List[List[str]]\n :type rates1: List[float]\n :type pairs2: List[List[str]]\n :type rates2: List[float]\n :rtype: float\n \"\"\"\n ",
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"code": "class Solution:\n def maxAmount(self, initialCurrency: str, pairs1: List[List[str]], rates1: List[float], pairs2: List[List[str]], rates2: List[float]) -> float:\n ",
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"code": "double maxAmount(char* initialCurrency, char*** pairs1, int pairs1Size, int* pairs1ColSize, double* rates1, int rates1Size, char*** pairs2, int pairs2Size, int* pairs2ColSize, double* rates2, int rates2Size) {\n \n}",
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"code": "public class Solution {\n public double MaxAmount(string initialCurrency, IList<IList<string>> pairs1, double[] rates1, IList<IList<string>> pairs2, double[] rates2) {\n \n }\n}",
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"code": "/**\n * @param {string} initialCurrency\n * @param {string[][]} pairs1\n * @param {number[]} rates1\n * @param {string[][]} pairs2\n * @param {number[]} rates2\n * @return {number}\n */\nvar maxAmount = function(initialCurrency, pairs1, rates1, pairs2, rates2) {\n \n};",
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"code": "function maxAmount(initialCurrency: string, pairs1: string[][], rates1: number[], pairs2: string[][], rates2: number[]): number {\n \n};",
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"code": "class Solution {\n\n /**\n * @param String $initialCurrency\n * @param String[][] $pairs1\n * @param Float[] $rates1\n * @param String[][] $pairs2\n * @param Float[] $rates2\n * @return Float\n */\n function maxAmount($initialCurrency, $pairs1, $rates1, $pairs2, $rates2) {\n \n }\n}",
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"code": "class Solution {\n func maxAmount(_ initialCurrency: String, _ pairs1: [[String]], _ rates1: [Double], _ pairs2: [[String]], _ rates2: [Double]) -> Double {\n \n }\n}",
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"code": "class Solution {\n fun maxAmount(initialCurrency: String, pairs1: List<List<String>>, rates1: DoubleArray, pairs2: List<List<String>>, rates2: DoubleArray): Double {\n \n }\n}",
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"code": "class Solution {\n double maxAmount(String initialCurrency, List<List<String>> pairs1, List<double> rates1, List<List<String>> pairs2, List<double> rates2) {\n \n }\n}",
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"code": "func maxAmount(initialCurrency string, pairs1 [][]string, rates1 []float64, pairs2 [][]string, rates2 []float64) float64 {\n \n}",
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"code": "# @param {String} initial_currency\n# @param {String[][]} pairs1\n# @param {Float[]} rates1\n# @param {String[][]} pairs2\n# @param {Float[]} rates2\n# @return {Float}\ndef max_amount(initial_currency, pairs1, rates1, pairs2, rates2)\n \nend",
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"code": "object Solution {\n def maxAmount(initialCurrency: String, pairs1: List[List[String]], rates1: Array[Double], pairs2: List[List[String]], rates2: Array[Double]): Double = {\n \n }\n}",
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"code": "impl Solution {\n pub fn max_amount(initial_currency: String, pairs1: Vec<Vec<String>>, rates1: Vec<f64>, pairs2: Vec<Vec<String>>, rates2: Vec<f64>) -> f64 {\n \n }\n}",
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"code": "(define/contract (max-amount initialCurrency pairs1 rates1 pairs2 rates2)\n (-> string? (listof (listof string?)) (listof flonum?) (listof (listof string?)) (listof flonum?) flonum?)\n )",
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"code": "-spec max_amount(InitialCurrency :: unicode:unicode_binary(), Pairs1 :: [[unicode:unicode_binary()]], Rates1 :: [float()], Pairs2 :: [[unicode:unicode_binary()]], Rates2 :: [float()]) -> float().\nmax_amount(InitialCurrency, Pairs1, Rates1, Pairs2, Rates2) ->\n .",
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"lang": "Elixir",
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"code": "defmodule Solution do\n @spec max_amount(initial_currency :: String.t, pairs1 :: [[String.t]], rates1 :: [float], pairs2 :: [[String.t]], rates2 :: [float]) :: float\n def max_amount(initial_currency, pairs1, rates1, pairs2, rates2) do\n \n end\nend",
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"Choose an intermediate currency. Convert from <code>initialCurrency</code> to this currency on day 1, and from that currency back to <code>initialCurrency</code> on day 2.",
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"Use a DFS/BFS to calculate the direct conversion rate between any two currencies."
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],
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"sampleTestCase": "\"EUR\"\n[[\"EUR\",\"USD\"],[\"USD\",\"JPY\"]]\n[2.0,3.0]\n[[\"JPY\",\"USD\"],[\"USD\",\"CHF\"],[\"CHF\",\"EUR\"]]\n[4.0,5.0,6.0]",
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