* @param arr 待排序数组
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，更多细节参见旺商聊官方下载
Comparison between the TIN, Knoll’s algorithm, and N-convex dithering using an 8-colour irregular palette. Left to right: TIN, Knoll, N-convex (N=4).，推荐阅读搜狗输入法2026获取更多信息
2-phase A* already uses many heuristics which don't always create an optimal route and still 5-10x slower.，这一点在搜狗输入法2026中也有详细论述
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