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DescriptionFor a given sorted array (ascending order) and a target number, find the first index of this number in O(log n) time complexity.If the targ 阅读全文
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DescriptionGiven a target number and an integer array sorted in ascending order. Find the total number of occurrences of target in the array.ExampleGi 阅读全文
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题目： An image is represented by a binary matrix with 0 as a white pixel and 1 as a black pixel. The black pixels are connected, i.e., there is only one 阅读全文
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题目： The set [1,2,3,…,n] contains a total of n! unique permutations. By listing and labeling all of the permutations in order,We get the following sequ 阅读全文