实战练习题目 - Array 盛最多水的容器 class Solution { public: int maxArea(vector<int>& height) { int res = 0; int i = 0; int j = height.size() - 1; while (i < j) { int area = (j - i) * min(height[i], height[j]); res = max(res, area); if (height[i] < hei…

接上文leetcode - 位运算题目汇总(上),继续来切leetcode中Bit Manipulation下的题目. Bitwise AND of Numbers Range 给出一个范围,[m, n](0 <= m <= n <= 2147483647),返回这些数字的与运算结果. 直接逐个做与运算,TLE,我们得发现高效解法. 我们把[0, 15]用二进制码表示出来: 0 0 0 0 0 0 0 1 0 0 1 0 0 0 1 1 0 1 0 0 0 1 0 1 0 1 1 0 0…

首先表达我对leetcode网站的感谢,与高校的OJ系统相比,leetcode上面的题目更贴近工作的需要,而且支持的语言广泛.对于一些比较困难的题目,可以从讨论区中学习别人的思路,这一点很方便. 经过一段时间的练习,我感觉自己的算法水平还是有很大的提升的.与学校开的算法导论的课程相比,我觉得实实在在的做题,比学习理论更符合我的认知方式.可能我属于那种脑子记不住,但是可以用“肌肉”去记忆的类型吧. 在做题的时候,我会尝试用感觉好玩的语言来写.如果把做题当成一种解谜游戏的话,那语言就是玩这个游戏选择…

题目标签:Array 题目给了一组int array A,让我们判断它是否是 一个山脉数组. 山脉数组一定要有一个最高值,然后要同时有 山坡和下坡. 想法是,从左边开始依次比较两个数字,int[0] int[1].... 如果是上坡,继续寻找,如果遇到了下坡,停止,这样就找到了最高点. 从右边也是同样的操作. 然后排除只有上坡的,或者只有下坡的情况. 最后比较一下, 左边找到的最高点和右边找到的最高点是否是同一个点. 具体看code. Java Solution: Runtime beats 9…

Given two sorted integer arrays nums1 and nums2, merge nums2 into nums1 as one sorted array. Note: The number of elements initialized in nums1 and nums2 are m and n respectively. You may assume that nums1 has enough space (size that is greater or equ…

Given an array where elements are sorted in ascending order, convert it to a height balanced BST. For this problem, a height-balanced binary tree is defined as a binary tree in which the depth of the two subtrees of every node never differ by more th…

Given a sorted array of integers nums and integer values a, b and c. Apply a function of the form f(x) = ax2 + bx + c to each element x in the array. The returned array must be in sorted order. Expected time complexity: O(n) Example: nums = [-4, -2,…

Shuffle a set of numbers without duplicates. Example: // Init an array with set 1, 2, and 3. int[] nums = {1,2,3}; Solution solution = new Solution(nums); // Shuffle the array [1,2,3] and return its result. Any permutation of [1,2,3] must equally lik…

[LeetCode]659. Split Array into Consecutive Subsequences 解题报告(Python) 标签(空格分隔): LeetCode 作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 题目地址:https://leetcode.com/problems/split-array-into-consecutive-subsequences/description/ 题目描述: You are g…

leetcode tree相关题目小结 所使用的方法不外乎递归,DFS,BFS. 1. 题100 Same Tree Given two binary trees, write a function to check if they are the same or not. Two binary trees are considered the same if they are structurally identical and the nodes have the same value Ex…