09 2019 档案
摘要：题目如下： 力扣团队买了一个可编程机器人，机器人初始位置在原点(0, 0)。小伙伴事先给机器人输入一串指令command，机器人就会无限循环这条指令的步骤进行移动。指令有两种： U: 向y轴正方向移动一格R: 向x轴正方向移动一格。不幸的是，在 xy 平面上还有一些障碍物，他们的坐标用obstacl
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摘要：题目如下： 小A 和 小B 在玩猜数字。小B 每次从 1, 2, 3 中随机选择一个，小A 每次也从 1, 2, 3 中选择一个猜。他们一共进行三次这个游戏，请返回 小A 猜对了几次？ 输入的guess数组为 小A 每次的猜测，answer数组为 小B 每次的选择。guess和answer的长度都等
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摘要：题目如下： 楼下水果店正在促销，你打算买些苹果，arr[i] 表示第 i 个苹果的单位重量。 你有一个购物袋，最多可以装 5000 单位重量的东西，算一算，最多可以往购物袋里装入多少苹果。 示例 1： 示例 2： 解题思路：排好序后，从小的装起。 代码如下：
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摘要：题目如下： 给你一个矩阵 mat，其中每一行的元素都已经按 递增 顺序排好了。请你帮忙找出在所有这些行中 最小的公共元素。 如果矩阵中没有这样的公共元素，就请返回 -1。 示例： 提示： 1 <= mat.length, mat[i].length <= 500 1 <= mat[i][j] <=
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摘要：题目如下： Write a program to find the n-th ugly number. Ugly numbers are positive integers which are divisible by a or b or c. Example 1: Example 2: Examp
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摘要：题目如下： You are given a string s, and an array of pairs of indices in the string pairs where pairs[i] = [a, b] indicates 2 indices(0-indexed) of the str
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摘要：题目如下： Given an array of distinct integers arr, find all pairs of elements with the minimum absolute difference of any two elements. Return a list of p
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摘要：题目如下： Sort a linked list using insertion sort. A graphical example of insertion sort. The partial sorted list (black) initially contains only the firs
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摘要：最近在学习在windows平台用flask框架提供Restful API服务，需要使得flask的windows应用能够开机自动运行，并且后台运行，所以通过service来实现。 首先尝试的是在自己派生的serivice类的中直接调用 create_app(debug=True).run(host=
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摘要：题目如下： We have a sequence of books: the i-th book has thickness books[i][0] and height books[i][1]. We want to place these books in order onto bookcase
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摘要：题目如下： Given an integer array arr and an integer k, modify the array by repeating it k times. For example, if arr = [1, 2] and k = 3 then the modified
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摘要：题目如下： Given a string s that consists of lower case English letters and brackets. Reverse the strings in each pair of matching parentheses, starting fr
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摘要：题目如下： Given a string text, you want to use the characters of text to form as many instances of the word "balloon" as possible. You can use each charac
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摘要：题目如下： In LeetCode Store, there are some kinds of items to sell. Each item has a price. However, there are some special offers, and a special offer con
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摘要：题目如下： In a project, you have a list of required skills req_skills, and a list of people. The i-th person people[i] contains a list of skills that pers
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摘要：题目如下： You have an infinite number of stacks arranged in a row and numbered (left to right) from 0, each of the stacks has the same maximum capacity. I
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摘要：题目如下： SQL Schema Table: Department + + + | Column Name | Type | + + + | id | int | | revenue | int | | month | varchar | + + + (id, month) is the prim
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摘要：题目如下： Given an array of integers, return the maximum sum for a non-empty subarray (contiguous elements) with at most one element deletion. In other wo
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摘要：题目如下： Given a date, return the corresponding day of the week for that date. The input is given as three integers representing the day, month and year
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摘要：题目如下： A bus has n stops numbered from 0 to n - 1 that form a circle. We know the distance between all pairs of neighboring stops where distance[i] is
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摘要：题目如下： With respect to a given puzzle string, a word is valid if both the following conditions are satisfied: word contains the first letter of puzzle.
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摘要：题目如下： Given a string s, we make queries on substrings of s. For each query queries[i] = [left, right, k], we may rearrange the substring s[left], ...,
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摘要：题目如下： Return the number of permutations of 1 to n so that prime numbers are at prime indices (1-indexed.) (Recall that an integer is prime if and only
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