In the "100 game," two players take turns adding, to a running total, any integer from 1..10. The player who first causes the running total to reach or exceed 100 wins. What if we change the game so that players cannot re-use integers? For examp…

In the "100 game," two players take turns adding, to a running total, any integer from 1..10. The player who first causes the running total to reach or exceed 100 wins. What if we change the game so that players cannot re-use integers? For examp…

动态规划是一种top-down求解模式,关键在于分解和求解子问题,然后根据子问题的解不断向上递推,得出最终解 因此dp涉及到保存每个计算过的子问题的解,这样当遇到同样的子问题时就不用继续向下求解而直接可以得到结果.状态压缩就是用来保存子问题的解的,主要思想是把所有可能的状态(子问题)用一个数据结构(通常是整数)统一表示,再用map把每个状态和对应结果关联起来,这样每次求解子问题时先find一下,如果map里面已经有该状态的解就不用再求了:同样每次求解完一个状态的解后也要将其放入map中保存 状态…

In the "100 game," two players take turns adding, to a running total, any integer from 1..10. The player who first causes the running total to reach or exceed 100 wins. What if we change the game so that players cannot re-use integers? For examp…

In the "100 game," two players take turns adding, to a running total, any integer from 1..10. The player who first causes the running total to reach or exceed 100 wins. What if we change the game so that players cannot re-use integers? For examp…

原题链接 两个人依次从1~maxNum中选取数字(不可重复选取同一个),累和.当一方选取数字累和后结果大于等于给定的目标数字,则此人胜利. 题目给一个maxNum和targetNum,要求判断先手能否胜利. 思路: 首先判断两种特殊条件: 可选最大值大于等于目标值,直接返回true. 其中一个人可选的最大值小于目标值,直接返回false. 具体再看题目,题目给出maxNum不大于20,则可状态压缩为一个int(32位)来保存每个数字是否被使用过(题解中利用1-32位进行存储). 利用一个map存…

终于将LeetCode的免费题刷完了,真是漫长的第一遍啊,估计很多题都忘的差不多了,这次开个题目汇总贴,并附上每道题目的解题连接,方便之后查阅吧~ 477 Total Hamming Distance 44.10% Meidum 475 Heaters  30.20% Easy 474 Ones and Zeroes  34.90% Meidum 473 Matchsticks to Square  31.80% Medium 472 Concatenated Words 29.20% Hard…

We are playing the Guess Game. The game is as follows: I pick a number from 1 to n. You have to guess which number I picked. Every time you guess wrong, I'll tell you whether the number I picked is higher or lower. However, when you guess a particula…

You are playing the following Flip Game with your friend: Given a string that contains only these two characters: + and -, you and your friend take turns to flip twoconsecutive "++" into "--". The game ends when a person can no longer…

You are playing the following Nim Game with your friend: There is a heap of stones on the table, each time one of you take turns to remove 1 to 3 stones. The one who removes the last stone will be the winner. You will take the first turn to remove th…

463. Island Perimeterhttps://leetcode.com/problems/island-perimeter/就是逐一遍历所有的cell,用分离的cell总的的边数减去重叠的边的数目即可.在查找重叠的边的数目的时候有一点小技巧,就是沿着其中两个方向就好,这种题目都有类似的规律,就是可以沿着上三角或者下三角形的方向来做.一刷一次ac,但是还没开始注意codestyle的问题,需要再刷一遍. class Solution { public: int islandPerime…

原题链接在这里:https://leetcode.com/problems/flip-game-ii/ 题目: You are playing the following Flip Game with your friend: Given a string that contains only these two characters: + and -, you and your friend take turns to flip two consecutive "++" into &…

e are playing the Guess Game. The game is as follows: I pick a number from 1 to n. You have to guess which number I picked. Every time you guess wrong, I'll tell you whether the number I picked is higher or lower. However, when you guess a particular…

leetcode python solution 1. two sum (easy) Given an array of integers, return indices of the two numbers such that they add up to a specific target. You may assume that each input would have exactly one solution. Example: Given nums = [2, 7, 11, 15],…

最近闲来无事刷LeetCode,发现这道题的Accept Rate还是挺高的,尝试着做了一下,结果悲剧了,把过程写下来,希望能长点记性.该题的描述翻译成中文如下: 你正在和你的朋友玩尼姆游戏(Nim Game): 桌子上有一堆石块,你和你的朋友轮流去拿这些石块,每次只能拿1块.2块或者3块.在石块被拿光前,最后一次拿到石块的人获胜.你将首先去拿这些石块. 你和你的朋友都非常聪明,并且拥有应对该游戏的最佳策略.写一个函数来决定在给定石块数量的情况下,你是否能够获胜.比如:如果桌子上有4块石块,那么…

刷题备忘录,for bug-free leetcode 396. Rotate Function 题意: Given an array of integers A and let n to be its length. Assume Bk to be an array obtained by rotating the array A k positions clock-wise, we define a "rotation function" F on A as follow: F(k…

You are playing the following Nim Game with your friend: There is a heap of stones on the table, each time one of you take turns to remove 1 to 3 stones. The one who removes the last stone will be the winner. You will take the first turn to remove th…

Let's play the minesweeper game (Wikipedia, online game)! You are given a 2D char matrix representing the game board. 'M' represents an unrevealed mine, 'E' represents an unrevealed empty square, 'B' represents a revealed blank square that has no adj…

Given an array of scores that are non-negative integers. Player 1 picks one of the numbers from either end of the array followed by the player 2 and then player 1 and so on. Each time a player picks a number, that number will not be available for the…

一天一道LeetCode 从今天开始,调整规律,不按顺序做,从easy开始! 本系列文章已全部上传至我的github,地址:ZeeCoder's Github 欢迎大家关注我的新浪微博,我的新浪微博 欢迎转载,转载请注明出处 (一)题目 You are playing the following Nim Game with your friend: There is a heap of stones on the table, each time one of you take turns to…

请点击页面左上角 -> Fork me on Github 或直接访问本项目Github地址:LeetCode Solution by Swift    说明:题目中含有$符号则为付费题目. 如:[Swift]LeetCode156.二叉树的上下颠倒 $ Binary Tree Upside Down 请下拉滚动条查看最新 Weekly Contest!!! Swift LeetCode 目录 | Catalog 序        号 题名Title 难度     Difficulty  两数之…

In the "100 game," two players take turns adding, to a running total, any integer from 1..10. The player who first causes the running total to reach or exceed 100 wins. What if we change the game so that players cannot re-use integers? For examp…

https://leetcode.com/problems/can-i-win/description/ In the "100 game," two players take turns adding, to a running total, any integer from 1..10. The player who first causes the running total to reach or exceed 100 wins. What if we change the g…

You are playing the following Flip Game with your friend: Given a string that contains only these two characters: + and -, you and your friend take turns to flip two consecutive "++" into "--". The game ends when a person can no longer…

刷题备忘录,for bug-free 招行面试题--求无序数组最长连续序列的长度,这里连续指的是值连续--间隔为1,并不是数值的位置连续 问题: 给出一个未排序的整数数组,找出最长的连续元素序列的长度. 如: 给出[100, 4, 200, 1, 3, 2], 最长的连续元素序列是[1, 2, 3, 4].返回它的长度:4. 你的算法必须有O(n)的时间复杂度 . 解法: 初始思路 要找连续的元素,第一反应一般是先把数组排序.但悲剧的是题目中明确要求了O(n)的时间复杂度,要做一次排序,是不能达…

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/minesweeper/description/ 题目: Let's play the minesweeper game (Wikipedia, online game)! You are given a 2D char matrix representing the game board. 'M' represents an unrevealed mine, 'E' represents an unrevealed e…

摘要: Nim Game.WordPattern.Move zeros.First Bad version.Ugly Number五个算法的python实现. 一个月多没更新,大概是因为状态一直不太好吧,有几次打开却不知从何写起.总结一下这一个月多:看了几个算法:接触了hadoop虽然还不算会:会用linux:看了HTML,JS:拿了两个省奖,其中一个真是一直的梦想:加入了一个团队也算是离自己的梦想更近一步:去过自己喜欢的地方:吃吃吃玩玩玩:做了好几件自己喜欢的事:帮到了挺多人:此刻却突然纠结于…

题目描述 Let's play the minesweeper game (Wikipedia, online game)! You are given a 2D char matrix representing the game board. 'M' represents an unrevealed mine, 'E' represents an unrevealed empty square, 'B' represents a revealed blank square that has n…

原题链接在这里:https://leetcode.com/problems/predict-the-winner/description/ 题目: Given an array of scores that are non-negative integers. Player 1 picks one of the numbers from either end of the array followed by the player 2 and then player 1 and so on. Ea…