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            "title": "Basic Calculator IV",
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            "content": "<p>Given an expression such as <code>expression = &quot;e + 8 - a + 5&quot;</code> and an evaluation map such as <code>{&quot;e&quot;: 1}</code> (given in terms of <code>evalvars = [&quot;e&quot;]</code> and <code>evalints = [1]</code>), return a list of tokens representing the simplified expression, such as <code>[&quot;-1*a&quot;,&quot;14&quot;]</code></p>\n\n<ul>\n\t<li>An expression alternates chunks and symbols, with a space separating each chunk and symbol.</li>\n\t<li>A chunk is either an expression in parentheses, a variable, or a non-negative integer.</li>\n\t<li>A variable is a string of lowercase letters (not including digits.) Note that variables can be multiple letters, and note that variables never have a leading coefficient or unary operator like <code>&quot;2x&quot;</code> or <code>&quot;-x&quot;</code>.</li>\n</ul>\n\n<p>Expressions are evaluated in the usual order: brackets first, then multiplication, then addition and subtraction.</p>\n\n<ul>\n\t<li>For example, <code>expression = &quot;1 + 2 * 3&quot;</code> has an answer of <code>[&quot;7&quot;]</code>.</li>\n</ul>\n\n<p>The format of the output is as follows:</p>\n\n<ul>\n\t<li>For each term of free variables with a non-zero coefficient, we write the free variables within a term in sorted order lexicographically.\n\t<ul>\n\t\t<li>For example, we would never write a term like <code>&quot;b*a*c&quot;</code>, only <code>&quot;a*b*c&quot;</code>.</li>\n\t</ul>\n\t</li>\n\t<li>Terms have degrees equal to the number of free variables being multiplied, counting multiplicity. We write the largest degree terms of our answer first, breaking ties by lexicographic order ignoring the leading coefficient of the term.\n\t<ul>\n\t\t<li>For example, <code>&quot;a*a*b*c&quot;</code> has degree <code>4</code>.</li>\n\t</ul>\n\t</li>\n\t<li>The leading coefficient of the term is placed directly to the left with an asterisk separating it from the variables (if they exist.) A leading coefficient of 1 is still printed.</li>\n\t<li>An example of a well-formatted answer is <code>[&quot;-2*a*a*a&quot;, &quot;3*a*a*b&quot;, &quot;3*b*b&quot;, &quot;4*a&quot;, &quot;5*c&quot;, &quot;-6&quot;]</code>.</li>\n\t<li>Terms (including constant terms) with coefficient <code>0</code> are not included.\n\t<ul>\n\t\t<li>For example, an expression of <code>&quot;0&quot;</code> has an output of <code>[]</code>.</li>\n\t</ul>\n\t</li>\n</ul>\n\n<p>&nbsp;</p>\n<p><strong>Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> expression = &quot;e + 8 - a + 5&quot;, evalvars = [&quot;e&quot;], evalints = [1]\n<strong>Output:</strong> [&quot;-1*a&quot;,&quot;14&quot;]\n</pre>\n\n<p><strong>Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> expression = &quot;e - 8 + temperature - pressure&quot;, evalvars = [&quot;e&quot;, &quot;temperature&quot;], evalints = [1, 12]\n<strong>Output:</strong> [&quot;-1*pressure&quot;,&quot;5&quot;]\n</pre>\n\n<p><strong>Example 3:</strong></p>\n\n<pre>\n<strong>Input:</strong> expression = &quot;(e + 8) * (e - 8)&quot;, evalvars = [], evalints = []\n<strong>Output:</strong> [&quot;1*e*e&quot;,&quot;-64&quot;]\n</pre>\n\n<p>&nbsp;</p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>1 &lt;= expression.length &lt;= 250</code></li>\n\t<li><code>expression</code> consists of lowercase English letters, digits, <code>&#39;+&#39;</code>, <code>&#39;-&#39;</code>, <code>&#39;*&#39;</code>, <code>&#39;(&#39;</code>, <code>&#39;)&#39;</code>, <code>&#39; &#39;</code>.</li>\n\t<li><code>expression</code> does not contain any leading or trailing spaces.</li>\n\t<li>All the tokens in <code>expression</code> are separated by a single space.</li>\n\t<li><code>0 &lt;= evalvars.length &lt;= 100</code></li>\n\t<li><code>1 &lt;= evalvars[i].length &lt;= 20</code></li>\n\t<li><code>evalvars[i]</code> consists of lowercase English letters.</li>\n\t<li><code>evalints.length == evalvars.length</code></li>\n\t<li><code>-100 &lt;= evalints[i] &lt;= 100</code></li>\n</ul>\n",
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                    "lang": "C++",
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                    "code": "class Solution {\npublic:\n    vector<string> basicCalculatorIV(string expression, vector<string>& evalvars, vector<int>& evalints) {\n        \n    }\n};",
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                    "code": "class Solution {\n    public List<String> basicCalculatorIV(String expression, String[] evalvars, int[] evalints) {\n        \n    }\n}",
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                    "lang": "Python",
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                    "code": "class Solution(object):\n    def basicCalculatorIV(self, expression, evalvars, evalints):\n        \"\"\"\n        :type expression: str\n        :type evalvars: List[str]\n        :type evalints: List[int]\n        :rtype: List[str]\n        \"\"\"\n        ",
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                    "code": "class Solution:\n    def basicCalculatorIV(self, expression: str, evalvars: List[str], evalints: List[int]) -> List[str]:\n        ",
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                    "lang": "C",
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                    "code": "\n\n/**\n * Note: The returned array must be malloced, assume caller calls free().\n */\nchar ** basicCalculatorIV(char * expression, char ** evalvars, int evalvarsSize, int* evalints, int evalintsSize, int* returnSize){\n\n}",
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                    "lang": "C#",
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                    "code": "public class Solution {\n    public IList<string> BasicCalculatorIV(string expression, string[] evalvars, int[] evalints) {\n        \n    }\n}",
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                    "code": "/**\n * @param {string} expression\n * @param {string[]} evalvars\n * @param {number[]} evalints\n * @return {string[]}\n */\nvar basicCalculatorIV = function(expression, evalvars, evalints) {\n    \n};",
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                    "code": "# @param {String} expression\n# @param {String[]} evalvars\n# @param {Integer[]} evalints\n# @return {String[]}\ndef basic_calculator_iv(expression, evalvars, evalints)\n    \nend",
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                    "code": "class Solution {\n    func basicCalculatorIV(_ expression: String, _ evalvars: [String], _ evalints: [Int]) -> [String] {\n        \n    }\n}",
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                    "lang": "Go",
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                    "code": "func basicCalculatorIV(expression string, evalvars []string, evalints []int) []string {\n    \n}",
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                    "lang": "Scala",
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                    "code": "object Solution {\n    def basicCalculatorIV(expression: String, evalvars: Array[String], evalints: Array[Int]): List[String] = {\n        \n    }\n}",
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                    "lang": "Kotlin",
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                    "code": "class Solution {\n    fun basicCalculatorIV(expression: String, evalvars: Array<String>, evalints: IntArray): List<String> {\n        \n    }\n}",
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                    "lang": "Rust",
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                    "code": "impl Solution {\n    pub fn basic_calculator_iv(expression: String, evalvars: Vec<String>, evalints: Vec<i32>) -> Vec<String> {\n        \n    }\n}",
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                    "lang": "PHP",
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                    "code": "class Solution {\n\n    /**\n     * @param String $expression\n     * @param String[] $evalvars\n     * @param Integer[] $evalints\n     * @return String[]\n     */\n    function basicCalculatorIV($expression, $evalvars, $evalints) {\n        \n    }\n}",
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                    "lang": "TypeScript",
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                    "code": "function basicCalculatorIV(expression: string, evalvars: string[], evalints: number[]): string[] {\n\n};",
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                    "code": "(define/contract (basic-calculator-iv expression evalvars evalints)\n  (-> string? (listof string?) (listof exact-integer?) (listof string?))\n\n  )",
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                    "lang": "Erlang",
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                    "code": "-spec basic_calculator_iv(Expression :: unicode:unicode_binary(), Evalvars :: [unicode:unicode_binary()], Evalints :: [integer()]) -> [unicode:unicode_binary()].\nbasic_calculator_iv(Expression, Evalvars, Evalints) ->\n  .",
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                    "code": "defmodule Solution do\n  @spec basic_calculator_iv(expression :: String.t, evalvars :: [String.t], evalints :: [integer]) :: [String.t]\n  def basic_calculator_iv(expression, evalvars, evalints) do\n\n  end\nend",
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                "One way is with a Polynomial class.  For example,\r\n\r\n* `Poly:add(this, that)` returns the result of `this + that`.\r\n* `Poly:sub(this, that)` returns the result of `this - that`.\r\n* `Poly:mul(this, that)` returns the result of `this * that`.\r\n* `Poly:evaluate(this, evalmap)` returns the polynomial after replacing all free variables with constants as specified by `evalmap`.\r\n* `Poly:toList(this)` returns the polynomial in the correct output format.\r\n\r\n* `Solution::combine(left, right, symbol)` returns the result of applying the binary operator represented by `symbol` to `left` and `right`.\r\n* `Solution::make(expr)` makes a new `Poly` represented by either the constant or free variable specified by `expr`.\r\n* `Solution::parse(expr)` parses an expression into a new `Poly`."
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Java 8 features such as lambda expressions and stream API can be used. </p>\\r\\n\\r\\n<p>Most standard library headers are already included automatically for your convenience.</p>\\r\\n<p>Includes <code>Pair</code> class from https://docs.oracle.com/javase/8/javafx/api/javafx/util/Pair.html.</p>\"], \"python\": [\"Python\", \"<p><code>Python 2.7.12</code>.</p>\\r\\n\\r\\n<p>Most libraries are already imported automatically for your convenience, such as <a href=\\\"https://docs.python.org/2/library/array.html\\\" target=\\\"_blank\\\">array</a>, <a href=\\\"https://docs.python.org/2/library/bisect.html\\\" target=\\\"_blank\\\">bisect</a>, <a href=\\\"https://docs.python.org/2/library/collections.html\\\" target=\\\"_blank\\\">collections</a>. If you need more libraries, you can import it yourself.</p>\\r\\n\\r\\n<p>For Map/TreeMap data structure, you may use <a href=\\\"http://www.grantjenks.com/docs/sortedcontainers/\\\" target=\\\"_blank\\\">sortedcontainers</a> library.</p>\\r\\n\\r\\n<p>Note that Python 2.7 <a href=\\\"https://www.python.org/dev/peps/pep-0373/\\\" target=\\\"_blank\\\">will not be maintained past 2020</a>. For the latest Python, please choose Python3 instead.</p>\"], \"c\": [\"C\", \"<p>Compiled with <code>gcc 8.2</code> using the gnu99 standard.</p>\\r\\n\\r\\n<p>Your code is compiled with level one optimization (<code>-O1</code>). <a href=\\\"https://github.com/google/sanitizers/wiki/AddressSanitizer\\\" target=\\\"_blank\\\">AddressSanitizer</a> is also enabled to help detect out-of-bounds and use-after-free bugs.</p>\\r\\n\\r\\n<p>Most standard library headers are already included automatically for your convenience.</p>\\r\\n\\r\\n<p>For hash table operations, you may use <a href=\\\"https://troydhanson.github.io/uthash/\\\" target=\\\"_blank\\\">uthash</a>. \\\"uthash.h\\\" is included by default. Below are some examples:</p>\\r\\n\\r\\n<p><b>1. Adding an item to a hash.</b>\\r\\n<pre>\\r\\nstruct hash_entry {\\r\\n    int id;            /* we'll use this field as the key */\\r\\n    char name[10];\\r\\n    UT_hash_handle hh; /* makes this structure hashable */\\r\\n};\\r\\n\\r\\nstruct hash_entry *users = NULL;\\r\\n\\r\\nvoid add_user(struct hash_entry *s) {\\r\\n    HASH_ADD_INT(users, id, s);\\r\\n}\\r\\n</pre>\\r\\n</p>\\r\\n\\r\\n<p><b>2. Looking up an item in a hash:</b>\\r\\n<pre>\\r\\nstruct hash_entry *find_user(int user_id) {\\r\\n    struct hash_entry *s;\\r\\n    HASH_FIND_INT(users, &user_id, s);\\r\\n    return s;\\r\\n}\\r\\n</pre>\\r\\n</p>\\r\\n\\r\\n<p><b>3. Deleting an item in a hash:</b>\\r\\n<pre>\\r\\nvoid delete_user(struct hash_entry *user) {\\r\\n    HASH_DEL(users, user);  \\r\\n}\\r\\n</pre>\\r\\n</p>\"], \"csharp\": [\"C#\", \"<p><a href=\\\"https://docs.microsoft.com/en-us/dotnet/csharp/whats-new/csharp-9\\\" target=\\\"_blank\\\">C# 10 with .NET 6 runtime</a></p>\\r\\n\\r\\n<p>Your code is compiled with debug flag enabled (<code>/debug</code>).</p>\"], \"javascript\": [\"JavaScript\", \"<p><code>Node.js 16.13.2</code>.</p>\\r\\n\\r\\n<p>Your code is run with <code>--harmony</code> flag, enabling <a href=\\\"http://node.green/\\\" target=\\\"_blank\\\">new ES6 features</a>.</p>\\r\\n\\r\\n<p><a href=\\\"https://lodash.com\\\" target=\\\"_blank\\\">lodash.js</a> library is included by default.</p>\\r\\n\\r\\n<p>For Priority Queue / Queue data structures, you may use <a href=\\\"https://github.com/datastructures-js/priority-queue\\\" target=\\\"_blank\\\">datastructures-js/priority-queue</a> and <a href=\\\"https://github.com/datastructures-js/queue\\\" target=\\\"_blank\\\">datastructures-js/queue</a>.</p>\"], \"ruby\": [\"Ruby\", \"<p><code>Ruby 3.1</code></p>\\r\\n\\r\\n<p>Some common data structure implementations are provided in the Algorithms module: https://www.rubydoc.info/github/kanwei/algorithms/Algorithms</p>\"], \"swift\": [\"Swift\", \"<p><code>Swift 5.5.2</code>.</p>\"], \"golang\": [\"Go\", \"<p><code>Go 1.17.6</code>.</p>\\r\\n\\r\\n<p>Support <a href=\\\"https://godoc.org/github.com/emirpasic/gods\\\" target=\\\"_blank\\\">https://godoc.org/github.com/emirpasic/gods</a> library.</p>\"], \"python3\": [\"Python3\", \"<p><code>Python 3.10</code>.</p>\\r\\n\\r\\n<p>Most libraries are already imported automatically for your convenience, such as <a href=\\\"https://docs.python.org/3/library/array.html\\\" target=\\\"_blank\\\">array</a>, <a href=\\\"https://docs.python.org/3/library/bisect.html\\\" target=\\\"_blank\\\">bisect</a>, <a href=\\\"https://docs.python.org/3/library/collections.html\\\" target=\\\"_blank\\\">collections</a>. 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