1. 分解：将数组递归分成两半，直到只剩1个元素
Greater than: Every domino half in this space must add up to more than the number.，这一点在91视频中也有详细论述
You can find ergonomic keyboards with and without number pads. Not having those number keys on the right hand side lets you keep your mouse closer in, minimizing overall reach. But if you work with numbers a lot, you’ll likely want that pad included. Some programmable boards allow for the use of layers, which temporarily repurpose keys and can provide you with a ten-key option through clever remapping of letter keys.，推荐阅读51吃瓜获取更多信息
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