LeetCode 33. Search in Rotated Sorted Array
這道題目很經典，本人表示在面試時遇見過，要求復雜度為O(logn)，很顯然必須用二分查找，但是旋轉導致數組並非從左到右都是有序的，因此我們在查找時需要做判斷，我們找打的終點左邊或者右邊至少一邊是有序的；如果中間數小於最右邊的數字，則右半段是有序的；如果中間數字大於最右邊數字，則左半段是有序的，參考下圖：
代碼如下：
部分圖片和思考來自於：
https://www.cnblogs.com/grandyang/p/4325648.html
https://www.cnblogs.com/cling-cling/p/4875961.html
LeetCode 33. Search in Rotated Sorted Array
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