<p>给定一个可包含重复数字的序列 <code>nums</code> ,<em><strong>按任意顺序</strong></em> 返回所有不重复的全排列。</p> <p> </p> <p><strong>示例 1:</strong></p> <pre> <strong>输入:</strong>nums = [1,1,2] <strong>输出:</strong> [[1,1,2], [1,2,1], [2,1,1]] </pre> <p><strong>示例 2:</strong></p> <pre> <strong>输入:</strong>nums = [1,2,3] <strong>输出:</strong>[[1,2,3],[1,3,2],[2,1,3],[2,3,1],[3,1,2],[3,2,1]] </pre> <p> </p> <p><strong>提示:</strong></p> <ul> <li><code>1 <= nums.length <= 8</code></li> <li><code>-10 <= nums[i] <= 10</code></li> </ul>