12 2018 档案
摘要：https://pintia.cn/problem-sets/994805342720868352/problems/994805409175420928 Given two sets of integers, the similarity of the sets is defined to be
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摘要：https://pintia.cn/problem-sets/994805342720868352/problems/994805485033603072 Suppose that all the keys in a binary tree are distinct positive integer
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摘要：https://leetcode.com/problems/construct-string-from-binary-tree/ You need to construct a string consists of parenthesis and integers from a binary tre
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摘要：https://pintia.cn/problem-sets/994805342720868352/problems/994805349394006016 Suppose that all the keys in a binary tree are distinct positive integer
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摘要：https://leetcode.com/problems/construct-binary-tree-from-inorder-and-postorder-traversal/ Given inorder and postorder traversal of a tree, construct t
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摘要：https://leetcode.com/problems/trim-a-binary-search-tree/ Given a binary search tree and the lowest and highest boundaries as L and R, trim the tree so
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摘要：https://pintia.cn/problem-sets/994805342720868352/problems/994805415005503488 Given any positive integer N, you are supposed to find all of its prime
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摘要：http://codeforces.com/contest/1092/problem/D2 Vova's family is building the Great Vova Wall (named by Vova himself). Vova's parents, grandparents, gra
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摘要：http://codeforces.com/contest/1092/problem/D1 Vova's family is building the Great Vova Wall (named by Vova himself). Vova's parents, grandparents, gra
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摘要：http://codeforces.com/contest/1092/problem/C Ivan wants to play a game with you. He picked some string ss of length nn consisting only of lowercase La
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摘要：http://codeforces.com/contest/1092/problem/B There are nn students in a university. The number of students is even. The ii-th student has programming
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摘要：http://codeforces.com/contest/1092/problem/A You are given two integers nn and kk. Your task is to construct such a string ss of length nn that for ea
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摘要：https://leetcode.com/problems/populating-next-right-pointers-in-each-node/ Given a binary tree Populate each next pointer to point to its next right n
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摘要：https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-tree/ Given a binary tree, find the lowest common ancestor (LCA) of two given nodes i
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摘要：https://pintia.cn/problem-sets/994805342720868352/problems/994805446102073344 Given a string, you are supposed to output the length of the longest sym
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摘要：http://poj.org/problem?id=1276 Description A Bank plans to install a machine for cash withdrawal. The machine is able to deliver appropriate @ bills f
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摘要：https://leetcode.com/problems/intersection-of-two-arrays/ Given two arrays, write a function to compute their intersection. Example 1: Example 2: Inpu
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摘要：https://leetcode.com/problems/sort-array-by-parity-ii/ Given an array A of non-negative integers, half of the integers in A are odd, and half of the i
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摘要：https://leetcode.com/problems/intersection-of-two-arrays-ii/ Given two arrays, write a function to compute their intersection. Example 1: Example 2: I
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摘要：https://leetcode.com/problems/hand-of-straights/ Alice has a hand of cards, given as an array of integers. Now she wants to rearrange the cards into g
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摘要：https://leetcode.com/problems/construct-binary-tree-from-preorder-and-inorder-traversal/ Given preorder and inorder traversal of a tree, construct the
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摘要：https://leetcode.com/problems/flatten-binary-tree-to-linked-list/ Given a binary tree, flatten it to a linked list in-place. For example, given the fo
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摘要：http://acm.hdu.edu.cn/showproblem.php?pid=2955 Problem Description The aspiring Roy the Robber has seen a lot of American movies, and knows that the b
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摘要：http://acm.hdu.edu.cn/showproblem.php?pid=2639 Problem Description The title of this problem is familiar,isn't it?yeah,if you had took part in the "Ro
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摘要：http://acm.hdu.edu.cn/showproblem.php?pid=1114 Problem Description Before ACM can do anything, a budget must be prepared and the necessary financial s
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摘要：http://acm.hdu.edu.cn/showproblem.php?pid=1059 Problem Description Marsha and Bill own a collection of marbles. They want to split the collection amon
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摘要：http://poj.org/problem?id=3624 Description Bessie has gone to the mall's jewelry store and spies a charm bracelet. Of course, she'd like to fill it wi
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摘要：http://acm.hdu.edu.cn/showproblem.php?pid=2191 Problem Description 急！灾区的食物依然短缺！为了挽救灾区同胞的生命，心系灾区同胞的你准备自己采购一些粮食支援灾区，现在假设你一共有资金n元，而市场有m种大米，每种大米都是袋装产品，其价格
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摘要：https://leetcode.com/problems/flip-equivalent-binary-trees/ For a binary tree T, we can define a flip operation as follows: choose any node, and swap
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摘要：https://leetcode.com/problems/binary-tree-postorder-traversal/ Given a binary tree, return the postorder traversal of its nodes' values. Example: Foll
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摘要：https://leetcode.com/problems/binary-tree-zigzag-level-order-traversal/ Given a binary tree, return the zigzag level order traversal of its nodes' val
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摘要：https://leetcode.com/problems/count-complete-tree-nodes/ Given a complete binary tree, count the number of nodes. Note: Definition of a complete binar
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摘要：https://leetcode.com/problems/binary-tree-level-order-traversal-ii/ Given a binary tree, return the bottom-up level order traversal of its nodes' valu
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摘要：https://pintia.cn/problem-sets/994805342720868352/problems/994805366343188480 There is a classical process named partition in the famous quick sort al
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摘要：https://pintia.cn/problem-sets/994805342720868352/problems/994805449625288704 Given a collection of number segments, you are supposed to recover the s
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摘要：https://leetcode.com/problems/path-sum/ Given a binary tree and a sum, determine if the tree has a root-to-leaf path such that adding up all the value
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摘要：https://leetcode.com/problems/letter-combinations-of-a-phone-number/ Given a string containing digits from 2-9 inclusive, return all possible letter c
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摘要：https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-search-tree/ Given a binary search tree (BST), find the lowest common ancestor (LCA)
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摘要：https://leetcode.com/problems/kth-smallest-element-in-a-bst/ Given a binary search tree, write a function kthSmallest to find the kth smallest element
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摘要：https://leetcode.com/problems/binary-tree-level-order-traversal/ Given a binary tree, return the level order traversal of its nodes' values. (ie, from
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摘要：https://leetcode.com/problems/binary-tree-right-side-view/ Given a binary tree, imagine yourself standing on the right side of it, return the values o
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摘要：https://leetcode.com/problems/find-largest-value-in-each-tree-row/ You need to find the largest value in each row of a binary tree. Example: 代码： 今天是不吃
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摘要：https://leetcode.com/problems/binary-tree-preorder-traversal/ Given a binary tree, return the preorder traversal of its nodes' values. Example: Follow
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摘要：https://pintia.cn/problem-sets/994805342720868352/problems/994805432256675840 Eva loves to collect coins from all over the universe, including some ot
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摘要：https://pintia.cn/problem-sets/994805342720868352/problems/994805460652113920 To store English words, one method is to use linked lists and store a wo
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摘要：https://leetcode.com/problems/binary-tree-paths/ Given a binary tree, return all root-to-leaf paths. Note: A leaf is a node with no children. Example:
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摘要：https://leetcode.com/problems/minimum-depth-of-binary-tree/ Given a binary tree, find its minimum depth. The minimum depth is the number of nodes alon
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摘要：https://leetcode.com/problems/balanced-binary-tree/ Given a binary tree, determine if it is height-balanced. For this problem, a height-balanced binar
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摘要：https://leetcode.com/problems/sum-of-left-leaves/ Find the sum of all left leaves in a given binary tree. Example: 代码：
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摘要：https://pintia.cn/problem-sets/994805342720868352/problems/994805502658068480 To evaluate the performance of our first year CS majored students, we co
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摘要：https://vjudge.net/contest/67836#problem/I Given a set of sticks of various lengths, is it possible to join them end-to-end to form a square? Input Th
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摘要：http://lx.lanqiao.cn/problemset.page?code=BEGIN-&userid=246004 BEGIN-1 A+B问题 代码： #include <bits/stdc++.h> using namespace std; int A, B; int main() {
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摘要：https://leetcode.com/problems/convert-sorted-array-to-binary-search-tree/ Given an array where elements are sorted in ascending order, convert it to a
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摘要：https://leetcode.com/problems/increasing-order-search-tree/ Given a tree, rearrange the tree in in-order so that the leftmost node in the tree is now
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摘要：https://leetcode.com/problems/power-of-three/ Given an integer, write a function to determine if it is a power of three. Example 1: Example 2: Example
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摘要：https://leetcode.com/problems/bulb-switcher/ There are n bulbs that are initially off. You first turn on all the bulbs. Then, you turn off every secon
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摘要：https://leetcode.com/problems/binary-tree-inorder-traversal/ Given a binary tree, return the inorder traversal of its nodes' values. Example: 代码： 二叉树
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摘要：https://leetcode.com/problems/symmetric-tree/ Given a binary tree, check whether it is a mirror of itself (ie, symmetric around its center). For examp
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摘要：https://leetcode.com/problems/search-in-a-binary-search-tree/ Given the root node of a binary search tree (BST) and a value. You need to find the node
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摘要：在学习二叉树的过程中按照书上打出来的代码 记下来要经常看看 希望我和我的树玩得开心 :-) ①二叉搜索树的插入删除搜索输出 #include <bits/stdc++.h> using namespace std; struct Node { int key; Node *left, *right,
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摘要：https://leetcode.com/problems/maximum-depth-of-binary-tree/ Given a binary tree, find its maximum depth. The maximum depth is the number of nodes alon
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摘要：https://leetcode.com/problems/integer-to-roman/ Roman numerals are represented by seven different symbols: I, V, X, L, C, D and M. For example, two is
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摘要：1091 N-自守数 代码： #include <bits/stdc++.h> using namespace std; int T; int A(int a) { int cnt = 0; while(a) { a /= 10; cnt ++; } return cnt; } int Pow(in
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摘要：https://pintia.cn/problem-sets/994805260223102976/problems/994805286714327040 据维基百科的定义： 插入排序是迭代算法，逐一获得输入数据，逐步产生有序的输出序列。每步迭代中，算法从输入序列中取出一元素，将之插入有序序列中正确
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摘要：https://pintia.cn/problem-sets/994805260223102976/problems/994805270356541440 批改多选题是比较麻烦的事情，本题就请你写个程序帮助老师批改多选题，并且指出哪道题错的人最多。 输入格式： 输入在第一行给出两个正整数 N（≤ 1
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摘要：https://pintia.cn/problem-sets/994805260223102976/problems/994805273883951104 萌萌哒表情符号通常由“手”、“眼”、“口”三个主要部分组成。简单起见，我们假设一个表情符号是按下列格式输出的： 现给出可选用的符号集合，请你按用
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摘要：http://codeforces.com/contest/1077/problem/E output standard output output standard output output Polycarp has prepared nn competitive programming pro
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摘要：https://ac.nowcoder.com/acm/contest/315#question A.平方数 代码： #include <bits/stdc++.h> using namespace std; int n; int ans = 0; int main() { scanf("%d",
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摘要：http://codeforces.com/contest/1077/problem/D You are given an array ss consisting of nn integers. You have to find any array tt of length kk such that
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摘要：https://leetcode.com/problems/invert-binary-tree/ Invert a binary tree. Example: Input: Output: Trivia:This problem was inspired by this original twee
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摘要：https://zufeoj.com/contest.php?cid=1483 问题 A: A 代码： #include <bits/stdc++.h> using namespace std; const int maxn = 1e5 + 10; int n; int num[maxn]; map
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摘要：https://leetcode.com/problems/same-tree/ Given two binary trees, write a function to check if they are the same or not. Two binary trees are considere
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摘要：https://leetcode.com/problems/zigzag-conversion/ The string "PAYPALISHIRING" is written in a zigzag pattern on a given number of rows like this: (you
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摘要：https://pintia.cn/problem-sets/994805260223102976/problems/994805260583813120 外观数列是指具有以下特点的整数序列： 它从不等于 1 的数字 d 开始，序列的第 n+1 项是对第 n 项的描述。比如第 2 项表示第 1 项有
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摘要：https://leetcode.com/problems/count-and-say/ The count-and-say sequence is the sequence of integers with the first five terms as following: 1 is read
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摘要：https://leetcode.com/problems/generate-parentheses/ Given n pairs of parentheses, write a function to generate all combinations of well-formed parenth
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摘要：https://leetcode.com/problems/first-missing-positive/ Given an unsorted integer array, find the smallest missing positive integer. Example 1: Example
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摘要：https://leetcode.com/problems/combination-sum-ii/ Given a collection of candidate numbers (candidates) and a target number (target), find all unique c
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摘要：https://pintia.cn/problem-sets/994805260223102976/problems/994805272021680128 拍集体照时队形很重要，这里对给定的 N 个人 K 排的队形设计排队规则如下： 每排人数为 N/K（向下取整），多出来的人全部站在最后一排； 后排
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摘要：https://leetcode.com/problems/combination-sum/ Given a set of candidate numbers (candidates) (without duplicates) and a target number (target), find a
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摘要：https://leetcode.com/problems/middle-of-the-linked-list/ Given a non-empty, singly linked list with head node head, return a middle node of linked lis
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摘要：https://leetcode.com/problems/delete-node-in-a-linked-list/ Write a function to delete a node (except the tail) in a singly linked list, given only ac
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摘要：https://leetcode.com/problems/palindrome-linked-list/ Given a singly linked list, determine if it is a palindrome. Example 1: Example 2: 代码： 妈耶 自己写对的第
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摘要：https://leetcode.com/problems/max-points-on-a-line/ Given n points on a 2D plane, find the maximum number of points that lie on the same straight line
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摘要：https://leetcode.com/problems/maximum-product-subarray/ Given an integer array nums, find the contiguous subarray within an array (containing at least
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摘要：https://leetcode.com/problems/summary-ranges/ Given a sorted integer array without duplicates, return the summary of its ranges. Example 1: Example 2:
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摘要：https://leetcode.com/problems/basic-calculator-ii/ Implement a basic calculator to evaluate a simple expression string. The expression string contains
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摘要：https://pintia.cn/problem-sets/994805260223102976/problems/1038429385296453632 以下文字摘自《灵机一动·好玩的数学》：“狼人杀”游戏分为狼人、好人两大阵营。在一局“狼人杀”游戏中，1 号玩家说：“2 号是狼人”，2 号玩家
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