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Given two binary search trees root1 and root2, return a list containing all the integers from both trees sorted in ascending order. Example 1: Input: 阅读全文
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Given an array of integers arr, return true if and only if it is a valid mountain array. Recall that arr is a mountain array if and only if: arr.lengt 阅读全文
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We define the usage of capitals in a word to be right when one of the following cases holds: All letters in this word are capitals, like "USA". All le 阅读全文
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An integer has sequential digits if and only if each digit in the number is one more than the previous digit. Return a sorted list of all the integers 阅读全文
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There are n gas stations along a circular route, where the amount of gas at the ith station is gas[i]. You have a car with an unlimited gas tank and i 阅读全文
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Koko loves to eat bananas. There are n piles of bananas, the ith pile has piles[i] bananas. The guards have gone and will come back in h hours. Koko c 阅读全文
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There are some spherical balloons taped onto a flat wall that represents the XY-plane. The balloons are represented as a 2D integer array points where 阅读全文
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You are given the root node of a binary search tree (BST) and a value to insert into the tree. Return the root node of the BST after the insertion. It 阅读全文
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ou are given the root of a binary tree where each node has a value 0 or 1. Each root-to-leaf path represents a binary number starting with the most si 阅读全文
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最近事情比较多，耽误了。。。。。。 Given two binary strings a and b, return their sum as a binary string. Example 1: Input: a = "11", b = "1" Output: "100" Example 2: 阅读全文