458. 可怜的小猪 有 1000 只水桶,其中有且只有一桶装的含有毒药,其余装的都是水.它们从外观看起来都一样.如果小猪喝了毒药,它会在 15 分钟内死去. 问题来了,如果需要你在一小时内,弄清楚哪只水桶含有毒药,你最少需要多少只猪? 回答这个问题,并为下列的进阶问题编写一个通用算法. 进阶: 假设有 n 只水桶,猪饮水中毒后会在 m 分钟内死亡,你需要多少猪(x)就能在 p 分钟内找出 "有毒" 水桶?这 n 只水桶里有且仅有一只有毒的桶. 提示: 可以允许小猪同时饮用任意数量的桶…

题目描述 有 buckets 桶液体,其中 正好 有一桶含有毒药,其余装的都是水.它们从外观看起来都一样.为了弄清楚哪只水桶含有毒药,你可以喂一些猪喝,通过观察猪是否会死进行判断.不幸的是,你只有 minutesToTest 分钟时间来确定哪桶液体是有毒的. 来源:力扣(LeetCode) 喂猪的规则如下: 选择若干活猪进行喂养 可以允许小猪同时饮用任意数量的桶中的水,并且该过程不需要时间. 小猪喝完水后,必须有 minutesToDie 分钟的冷却时间.在这段时间里,你只能观察,而不允许继续喂…

Find all possible combinations of k numbers that add up to a number n, given that only numbers from 1 to 9 can be used and each combination should be a unique set of numbers. Ensure that numbers within the set are sorted in ascending order. Example 1…

Given a string S, you are allowed to convert it to a palindrome by adding characters in front of it. Find and return the shortest palindrome you can find by performing this transformation. For example: Given "aacecaaa", return "aaacecaaa&qu…

Given a 2D board and a list of words from the dictionary, find all words in the board. Each word must be constructed from letters of sequentially adjacent cell, where "adjacent" cells are those horizontally or vertically neighboring. The same le…

Design a data structure that supports the following two operations: void addWord(word)bool search(word) search(word) can search a literal word or a regular expression string containing only letters a-z or .. A . means it can represent any one letter.…

There are a total of n courses you have to take, labeled from 0 to n - 1. Some courses may have prerequisites, for example to take course 0 you have to first take course 1, which is expressed as a pair: [0,1] Given the total number of courses and a l…

Given a 2d grid map of '1's (land) and '0's (water), count the number of islands. An island is surrounded by water and is formed by connecting adjacent lands horizontally or vertically. You may assume all four edges of the grid are all surrounded by…

Say you have an array for which the ith element is the price of a given stock on day i. Design an algorithm to find the maximum profit. You may complete at most k transactions. 解题思路: https://leetcode.com/discuss/18330/is-it-best-solution-with-o-n-o-1…

Suppose a sorted array is rotated at some pivot unknown to you beforehand. (i.e., 0 1 2 4 5 6 7 might become 4 5 6 7 0 1 2). Find the minimum element. The array may contain duplicates. 解题思路: 参考Java for LeetCode 081 Search in Rotated Sorted Array II J…