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题目： Given an integer array nums, find the sum of the elements between indices i and j (i ≤ j), inclusive. 给定整数数组nums，找到索引i和j（i≤j）之间的元素之和，包括端点。 Example 阅读全文
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题目： Given a binary tree, find its minimum depth. 给定二叉树，找到它的最小深度。 The minimum depth is the number of nodes along the shortest path from the root node d 阅读全文
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题目： Design a class to find the kth largest element in a stream. Note that it is the kth largest element in the sorted order, not the kth distinct elem 阅读全文
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题目： Given a singly linked list, determine if it is a palindrome. 给出一个单链表，确定它是否是回文。 Example 1: Example 2: Follow up:Could you do it in O(n) time and O( 阅读全文