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There are n buildings in a line. You are given an integer array heights of size n that represents the heights of the buildings in the line. The ocean 阅读全文
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Some people will make friend requests. The list of their ages is given and ages[i] is the age of the ith person. Person A will NOT friend request pers 阅读全文
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Given an array of integers nums, calculate the pivot index of this array. The pivot index is the index where the sum of all the numbers strictly to th 阅读全文
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Given a node from a Circular Linked List which is sorted in ascending order, write a function to insert a value insertVal into the list such that it r 阅读全文
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Given an unsorted array of integers nums, return the length of the longest continuous increasing subsequence (i.e. subarray). The subsequence must be 阅读全文
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Given an integer array arr, remove a subarray (can be empty) from arr such that the remaining elements in arr are non-decreasing. A subarray is a cont 阅读全文
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Given an array consists of non-negative integers, your task is to count the number of triplets chosen from the array that can make triangles if we tak 阅读全文
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Given three integer arrays arr1, arr2 and arr3 sorted in strictly increasing order, return a sorted array of only the integers that appeared in all th 阅读全文
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Given the root of a binary tree, find the maximum average value of any subtree of that tree. (A subtree of a tree is any node of that tree plus all it 阅读全文
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第二题 给两个数组，两个数组中的元素都是pair<int, int>，数组表示压缩后的一串数字 A: [(1, 2), (3,1), (2,3), (3, 1)] 表示 {1, 1, 3, 2, 2, 2, 3} B: [(5, 1), (1,1), (3,4), (2, 1)] 表示 {5, 1, 阅读全文