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［抄题］： We are given two strings, A and B. A shift on A consists of taking string A and moving the leftmost character to the rightmost position. For exa 阅读全文
posted @ 2018-08-10 22:07
苗妙苗
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［抄题］： A rectangle is represented as a list [x1, y1, x2, y2], where (x1, y1) are the coordinates of its bottom-left corner, and (x2, y2) are the coordi 阅读全文
posted @ 2018-08-10 21:56
苗妙苗
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［抄题］： Given a binary tree, return the values of its boundary in anti-clockwise direction starting from root. Boundary includes left boundary, leaves, 阅读全文
posted @ 2018-08-10 10:34
苗妙苗
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［抄题］： Implement an iterator to flatten a 2d vector. Example: [暴力解法]： 时间分析： 空间分析： [优化后]： 时间分析： 空间分析： ［奇葩输出条件］： ［奇葩corner case］： j必须非空且有下才行j != null && 阅读全文
posted @ 2018-08-10 08:52
苗妙苗
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