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算法题/create-target-array-in-the-given-order.html

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+<p>Given two arrays of integers&nbsp;<code>nums</code> and <code>index</code>. Your task is to create <em>target</em> array under the following rules:</p>
+
+<ul>
+	<li>Initially <em>target</em> array is empty.</li>
+	<li>From left to right read nums[i] and index[i], insert at index <code>index[i]</code>&nbsp;the value <code>nums[i]</code>&nbsp;in&nbsp;<em>target</em> array.</li>
+	<li>Repeat the previous step until there are no elements to read in <code>nums</code> and <code>index.</code></li>
+</ul>
+
+<p>Return the <em>target</em> array.</p>
+
+<p>It is guaranteed that the insertion operations will be valid.</p>
+
+<p>&nbsp;</p>
+<p><strong>Example 1:</strong></p>
+
+<pre>
+<strong>Input:</strong> nums = [0,1,2,3,4], index = [0,1,2,2,1]
+<strong>Output:</strong> [0,4,1,3,2]
+<strong>Explanation:</strong>
+nums       index     target
+0            0        [0]
+1            1        [0,1]
+2            2        [0,1,2]
+3            2        [0,1,3,2]
+4            1        [0,4,1,3,2]
+</pre>
+
+<p><strong>Example 2:</strong></p>
+
+<pre>
+<strong>Input:</strong> nums = [1,2,3,4,0], index = [0,1,2,3,0]
+<strong>Output:</strong> [0,1,2,3,4]
+<strong>Explanation:</strong>
+nums       index     target
+1            0        [1]
+2            1        [1,2]
+3            2        [1,2,3]
+4            3        [1,2,3,4]
+0            0        [0,1,2,3,4]
+</pre>
+
+<p><strong>Example 3:</strong></p>
+
+<pre>
+<strong>Input:</strong> nums = [1], index = [0]
+<strong>Output:</strong> [1]
+</pre>
+
+<p>&nbsp;</p>
+<p><strong>Constraints:</strong></p>
+
+<ul>
+	<li><code>1 &lt;= nums.length, index.length &lt;= 100</code></li>
+	<li><code>nums.length == index.length</code></li>
+	<li><code>0 &lt;= nums[i] &lt;= 100</code></li>
+	<li><code>0 &lt;= index[i] &lt;= i</code></li>
+</ul>