62 lines
1.9 KiB
Markdown
62 lines
1.9 KiB
Markdown
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<p>给你一个目标数组 <code>target</code> 和一个整数 <code>n</code>。每次迭代，需要从 <code>list = {1,2,3..., n}</code> 中依序读取一个数字。</p>
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<p>请使用下述操作来构建目标数组 <code>target</code> ：</p>
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<ul>
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<li><strong>Push</strong>：从 <code>list</code> 中读取一个新元素， 并将其推入数组中。</li>
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<li><strong>Pop</strong>：删除数组中的最后一个元素。</li>
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<li>如果目标数组构建完成，就停止读取更多元素。</li>
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</ul>
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<p>题目数据保证目标数组严格递增，并且只包含 <code>1</code> 到 <code>n</code> 之间的数字。</p>
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<p>请返回构建目标数组所用的操作序列。</p>
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<p>题目数据保证答案是唯一的。</p>
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<p> </p>
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<p><strong>示例 1：</strong></p>
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<pre>
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<strong>输入：</strong>target = [1,3], n = 3
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<strong>输出：</strong>["Push","Push","Pop","Push"]
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<strong>解释：
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</strong>读取 1 并自动推入数组 -> [1]
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读取 2 并自动推入数组，然后删除它 -> [1]
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读取 3 并自动推入数组 -> [1,3]
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</pre>
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<p><strong>示例 2：</strong></p>
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<pre>
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<strong>输入：</strong>target = [1,2,3], n = 3
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<strong>输出：</strong>["Push","Push","Push"]
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</pre>
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<p><strong>示例 3：</strong></p>
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<pre>
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<strong>输入：</strong>target = [1,2], n = 4
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<strong>输出：</strong>["Push","Push"]
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<strong>解释：</strong>只需要读取前 2 个数字就可以停止。
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</pre>
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<p><strong>示例 4：</strong></p>
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<pre>
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<strong>输入：</strong>target = [2,3,4], n = 4
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<strong>输出：</strong>["Push","Pop","Push","Push","Push"]
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</pre>
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<p> </p>
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<p><strong>提示：</strong></p>
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<ul>
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<li><code>1 <= target.length <= 100</code></li>
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<li><code>1 <= target[i] <= 100</code></li>
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<li><code>1 <= n <= 100</code></li>
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<li><code>target</code> 是严格递增的</li>
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</ul>
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<div><div>Related Topics</div><div><li>栈</li></div></div>\n<div><li>👍 18</li><li>👎 0</li></div>
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