"content":"<p>You are given two <strong>0-indexed</strong> integer arrays, <code>nums1</code> and <code>nums2</code>, both having length <code>n</code>.</p>\n\n<p>You are allowed to perform a series of <strong>operations</strong> (<strong>possibly none</strong>).</p>\n\n<p>In an operation, you select an index <code>i</code> in the range <code>[0, n - 1]</code> and <strong>swap</strong> the values of <code>nums1[i]</code> and <code>nums2[i]</code>.</p>\n\n<p>Your task is to find the <strong>minimum</strong> number of operations required to satisfy the following conditions:</p>\n\n<ul>\n\t<li><code>nums1[n - 1]</code> is equal to the <strong>maximum value</strong> among all elements of <code>nums1</code>, i.e., <code>nums1[n - 1] = max(nums1[0], nums1[1], ..., nums1[n - 1])</code>.</li>\n\t<li><code>nums2[n - 1]</code> is equal to the <strong>maximum</strong> <strong>value</strong> among all elements of <code>nums2</code>, i.e., <code>nums2[n - 1] = max(nums2[0], nums2[1], ..., nums2[n - 1])</code>.</li>\n</ul>\n\n<p>Return <em>an integer denoting the <strong>minimum</strong> number of operations needed to meet <strong>both</strong> conditions</em>, <em>or </em><code>-1</code><em> if it is <strong>impossible</strong> to satisfy both conditions.</em></p>\n\n<p> </p>\n<p><strong class=\"example\">Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> nums1 = [1,2,7], nums2 = [4,5,3]\n<strong>Output:</strong> 1\n<strong>Explanation:</strong> In this example, an operation can be performed using index i = 2.\nWhen nums1[2] and nums2[2] are swapped, nums1 becomes [1,2,3] and nums2 becomes [4,5,7].\nBoth conditions are now satisfied.\nIt can be shown that the minimum number of operations needed to be performed is 1.\nSo, the answer is 1.\n</pre>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> nums1 = [2,3,4,5,9], nums2 = [8,8,4,4,4]\n<strong>Output:</strong> 2\n<strong>Explanation:</strong> In this example, the following operations can be performed:\nFirst operation using index i = 4.\nWhen nums1[4] and nums2[4] are swapped, nums1 becomes [2,3,4,5,4], and nums2 becomes [8,8,4,4,9].\nAnother operation using index i = 3.\nWhen nums1[3] and nums2[3] are swapped, nums1 becomes [2,3,4,4,4], and nums2 becomes [8,8,4,5,9].\nBoth conditions are now satisfied.\nIt can be shown that the minimum number of operations needed to be performed is 2.\nSo, the answer is 2. \n</pre>\n\n<p><strong class=\"example\">Example 3:</strong></p>\n\n<pre>\n<strong>Input:</strong> nums1 = [1,5,4], nums2 = [2,5,3]\n<strong>Output:</strong> -1\n<strong>Explanation:</strong> In this example, it is not possible to satisfy both conditions. \nSo, the answer is -1.\n</pre>\n\n<p> </p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>1 <= n == nums1.length == nums2.length <= 1000</code></li>\n\t<li><code>1 <= nums1[i] <= 10<sup>9</sup></code></li>\n\t<li><code>1 <= nums2[i] <= 10<sup>9</sup></code></li>\n</ul>\n",
"Consider how to calculate the minimum number of operations when <code>nums1[n - 1]</code> and <code>nums2[n - 1]</code> are fixed (they are not swapped).",
"For each index <code>i</code>, there are only <code>3</code> possibilities: <ul>\r\n<li><code>nums1[i] <= nums1[n - 1] && nums2[i] <= nums2[n - 1]</code>. We don't need to swap them.</li>\r\n<li><code>nums1[i] <= nums2[n - 1] && nums2[i] <= nums1[n - 1]</code>. We have to swap them.</li>\r\n<li>Otherwise, there is no solution.</li>\r\n</ul>",
"There are <code>2</code> cases to determine the minimum number of operations: <ul>\r\n<li>The first case is the number of indices that need to be swapped when <code>nums1[n - 1]</code> and <code>nums2[n - 1]</code> are fixed.</li>\r\n<li>The second case is <code>1 +</code> the number of indices that need to be swapped when <code>nums1[n - 1]</code> and <code>nums2[n - 1]</code> are swapped.</li>\r\n</ul>",
"The answer is the minimum of both cases or <code>-1</code> if there is no solution in either case."
"envInfo":"{\"cpp\": [\"C++\", \"<p>Compiled with <code> clang 11 </code> using the latest C++ 20 standard.</p>\\r\\n\\r\\n<p>Your code is compiled with level two optimization (<code>-O2</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>\"], \"java\": [\"Java\", \"<p><code>OpenJDK 17</code>. 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 gnu11 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://learn.microsoft.com/en-us/dotnet/csharp/whats-new/csharp-10\\\" target=\\\"_blank\\\">C# 10 with .NET 6 runtime</a></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 5.3.0 version of <a href=\\\"https://github.com/datastructures-js/priority-queue/tree/fb4fdb984834421279aeb081df7af624d17c2a03\\\" target=\\\"_blank\\\">datastructures-js/priority-queue</a> and 4.2.1 version of <a href=\\\"https://githu
