作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 图 日期 题目地址:https://leetcode.com/problems/flower-planting-with-no-adjacent/ 题目描述 You have N gardens, labelled 1 to N. In each garden, you want to plant one of 4 types of flowers.…

题目如下: You have N gardens, labelled 1 to N.  In each garden, you want to plant one of 4 types of flowers. paths[i] = [x, y] describes the existence of a bidirectional path from garden x to garden y. Also, there is no garden that has more than 3 paths…

problem 1042. Flower Planting With No Adjacent 参考 1. Leetcode_easy_1042. Flower Planting With No Adjacent; 完…

题意: 本题题意为: 寻找一个花园的涂色方案,要求 1.花园和花园之间,不能有路径连接的,不能涂成相同颜色的 一共有4中颜色,花园和花园之间,至多有三条路径 我菜了 - - ,又没做出来.. 看答案 使用贪心: idea: 对每一个花园依次进行染色时,必定可以直接染色,因为相临接的最多最多就是三个,一共4中颜色,所以一定可以直接染色了 具体想法: 每次对节点染色时,新建一个colors数组,colors[j] , 代表节点i旁边临接的节点赋值的颜色是否有,如果有,就赋值为1 然后遍历,color…

[LeetCode]Minimum Depth of Binary Tree Given a binary tree, find its minimum depth. The minimum depth is the number of nodes along the shortest path from the root node down to the nearest leaf node. 递归和非递归,此提比较简单.广度优先遍历即可.关键之处就在于如何保持访问深度. 下面是4种代码: im…

Given an index k, return the kth row of the Pascal's triangle. For example, given k = 3, Return [1,3,3,1]. Note: Could you optimize your algorithm to use only O(k) extra space? 思路:最简单的方法就是依照[Leetcode]Pascal's Triangle 的方式自顶向下依次求解,但会造成空间的浪费.若仅仅用一个vect…

53. Maximum Subarray[leetcode] Find the contiguous subarray within an array (containing at least one number) which has the largest sum. For example, given the array [-2,1,-3,4,-1,2,1,-5,4],the contiguous subarray [4,-1,2,1] has the largest sum = 6. 挑…

27. Remove Element[leetcode] Given an array and a value, remove all instances of that value in place and return the new length. Do not allocate extra space for another array, you must do this in place with constant memory. The order of elements can b…

[刷题][LeetCode]总 用动画的形式呈现解LeetCode题目的思路 参考链接-空 007-整数反转 方法: 弹出和推入数字 & 溢出前进行检查 思路: 我们可以一次构建反转整数的一位数字.在这样做的时候,我们可以预先检查向原整数附加另一位数字是否会导致溢出. 算法: 反转整数的方法可以与反转字符串进行类比. 我们想重复"弹出" x 的最后一位数字,并将它"推入"到 rev 的后面.最后,rev 将与 x 相反. 要在没有辅助堆栈 / 数组的帮助下…

[刷题][LeetCode]总 用动画的形式呈现解LeetCode题目的思路 参考链接 000-十大经典排序算法…