Problem A. Arrangement of Contest 题目连接: http://codeforces.com/gym/100269/attachments Description Little Dmitry and little Petr want to arrange a contest. Their little friends submitted several task proposals and now Dmitry and Petr want to select som…

Smallest Difference Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 10387   Accepted: 2836 Description Given a number of distinct decimal digits, you can form one integer by choosing a non-empty subset of these digits and writing them in…

Squares Time Limit: 3500MS   Memory Limit: 65536K Total Submissions: 16631   Accepted: 6328 Description A square is a 4-sided polygon whose sides have equal length and adjacent sides form 90-degree angles. It is also a polygon such that rotating abou…

DFS基础 深度优先搜索(Depth First Search)是一种搜索思路,相比广度优先搜索(BFS),DFS对每一个分枝路径深入到不能再深入为止,其应用于树/图的遍历.嵌套关系处理.回溯等,可以用递归.堆栈(stack)实现DFS过程. 关于广度优先搜索(BFS)详见:算法与数据结构基础 - 广度优先搜索(BFS) 关于递归(Recursion)详见:算法与数据结构基础 - 递归(Recursion) 树的遍历 DFS常用于二叉树的遍历,关于二叉树详见: 算法与数据结构基础 - 二叉查找树…

数组基础 数组是最基础的数据结构,特点是O(1)时间读取任意下标元素,经常应用于排序(Sort).双指针(Two Pointers).二分查找(Binary Search).动态规划(DP)等算法.顺序访问数组.按下标取值是对数组的常见操作. 相关LeetCode题: 905. Sort Array By Parity  题解 922. Sort Array By Parity II  题解 977. Squares of a Sorted Array  题解 1150. Check If a…

题目题意翻译题意简述:现在给一个N*N的矩阵,找一条路径从左上角走到右下角,每次可以向上下左右四个方向中某个方向走.要求走过的点中,数字最大的减去最小的.要求值越小越好.现在就是要求这个值. 输入格式: 第一行给出一个数字N(2 <= N <= 100),代表矩阵的大小.接下来一个N行N列的矩阵,里面每个数字的值在[0,110]之间. 输出格式: 一个数字,如翻译中所述 题目描述English VietnameseFarmer John and Bessie the cow have emba…

Description Farmer John has discovered that his cows produce higher quality milk when they are subject to strenuous exercise. He therefore decides to send his N cows (1 <= N <= 25,000) to climb up and then back down a nearby mountain! Cow i takes U(…

突然很想刷刷题,LeetCode是一个不错的选择,忽略了输入输出,更好的突出了算法,省去了不少时间. dalao们发现了任何错误,或是代码无法通过,或是有更好的解法,或是有任何疑问和建议的话,可以在对应的随笔下面评论区留言,我会及时处理,在此谢过了. 过程或许会很漫长,也很痛苦,慢慢来吧. 编号 题名 过题率 难度 1 Two Sum 0.376 Easy 2 Add Two Numbers 0.285 Medium 3 Longest Substring Without Repeating C…

原题链接在这里:https://leetcode.com/problems/lonely-pixel-i/ 题目: Given a picture consisting of black and white pixels, find the number of black lonely pixels. The picture is represented by a 2D char array consisting of 'B' and 'W', which means black and whi…

原题链接在这里:https://leetcode.com/problems/longest-mountain-in-array/ 题目: Let's call any (contiguous) subarray B (of A) a mountain if the following properties hold: B.length >= 3 There exists some 0 < i < B.length - 1 such that B[0] < B[1] < ...…