binary-search

问题 I've been learning some algorithms and I can't find the reason why my method is failing. if you could look at the code and shed some light as to why that is happening. I would truly appreciate it. I'm trying to write a method that would binary search an array recursively and so far that is all my code. def recursive_binary_search(arr, target) max_index = arr.length - 1 mid_index = max_index / 2 if arr[mid_index] > target new_arr = arr[0..(mid_index - 1)] recursive_binary_search(new_arr,

问题 How would the algorithm's (of Insertion Sort of O(n^2) ) complexity change if you changed the algorithm to use a binary search instead of searching previous values until you found where to insert your current value. Also, When would this be useful? 回答1: Your new complexity is still quadratic , since you need to move all of the sorted parts rightward. Therefore, using binary search is only marginally better. I would recommend a fast sorting algorithm (in O(n log n) time) for large arrays, the

问题 How would the algorithm's (of Insertion Sort of O(n^2) ) complexity change if you changed the algorithm to use a binary search instead of searching previous values until you found where to insert your current value. Also, When would this be useful? 回答1: Your new complexity is still quadratic , since you need to move all of the sorted parts rightward. Therefore, using binary search is only marginally better. I would recommend a fast sorting algorithm (in O(n log n) time) for large arrays, the

问题 I understand that binary search cannot be done for an unordered array. I also understand that the complexity of a binary search in an ordered array is O(log(n)) . Can I ask what is the complexity for binary search(insertion) for an ordered array? I saw from a textbook, it stated that the complexity is O(n) . Why isn't it O(1) since, it can insert directly, just like linear search. Since binary search can't be done in unordered list, why is it possible to do insertion, with a complexity of O(N

来源： https://stackoverflow.com/questions/59375023/absolute-elements-sums

来源： https://stackoverflow.com/questions/4306094/find-closest-index-by-difference-with-binarysearch

来源： https://stackoverflow.com/questions/26564658/binary-search-and-invariant-relation

来源： https://stackoverflow.com/questions/35032787/kth-maximum-sum-of-a-contiguous-subarray-of-ve-integers-in-onlogs

来源： https://stackoverflow.com/questions/44231413/binary-search-using-start-end-vs-using-start-end

来源： https://stackoverflow.com/questions/35613574/when-to-use-in-binary-search-condition