When subtracting the start element of a subarray, we need to ensure that after this step, there is still at least one element in currSum. Otherwise, this algorithm would break for the following corner case. For the case of given sum 0 and all elements in currSum are bigger than 0: cur...
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Given a sorted array of n distinct integers where each integer is in the range from 0 to m - 1 and m > n. Find the smallest number that is missing from the array. Analysis: Solution 1. O(n), linear scan; Solution 2. O(log n), binary search: if arr[mid] > mid, then the f...
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http://www.practice.geeksforgeeks.org/problem-page.php?pid=387 Find sum of different corresponding bits for all pairs We define f (X, Y) as number of different corresponding bits in binary representation of X and Y. For example, f (2, 7) = 2, since binary representation of 2 and 7...
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Solution 2. Level order traversal, found the first leaf node and return its level. This solution is better than the recursive solution because we don't need to traverse all nodes. 1importjava.util.LinkedList;2importjava.util.Queue;34publicclassMinDepthBt {5publicintgetMinDepth(TreeNode root)...
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