适用场景：需要求「下一个更大/更小」「上一个更大/更小」、或「右侧第一个满足某条件的元素」时，可优先考虑单调栈。与堆不同，单调栈不负责全局最值，只处理「相邻关系」类的一维序列问题。
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Eleanor LawsonWest Midlands
Most ergonomic keyboards fall into two categories: fully split which separates the board into two pieces, and unibody split, also known as an Alice design, which angles the keys outward at the bottom. When the keys are rotated outward or split into two halves, it allows for a wider spread between your elbows for a more relaxed typing position. Other ergonomic features, such as thumb clusters, center tenting and negative tilting are sometimes added to either type of board.
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