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// 逻辑：只要左侧元素最小值，说明该元素需纳入无序区间，左边界左移
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Москвичей предупредили о резком похолодании09:45。业内人士推荐WPS官方版本下载作为进阶阅读
Step through the construction below. Each time a new point is inserted, watch the tree decide whether it needs to split a region: