05 2019 档案
发表于 2019-05-31 22:30阅读：172评论：0推荐：0
摘要：Given an integer array, your task is to find all the different possible increasing subsequences of the given array, and the length of an increasing su
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发表于 2019-05-31 21:18阅读：24189评论：0推荐：0
摘要：Think about Zuma Game. You have a row of balls on the table, colored red(R), yellow(Y), blue(B), green(G), and white(W). You also have several balls i
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发表于 2019-05-30 22:32阅读：252评论：0推荐：0
摘要：Remember the story of Little Match Girl? By now, you know exactly what matchsticks the little match girl has, please find out a way you can make one s
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发表于 2019-05-30 22:00阅读：223评论：0推荐：0
摘要：Given a reference of a node in a connected undirected graph, return a deep copy (clone) of the graph. Each node in the graph contains a val (int) and
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发表于 2019-05-29 16:31阅读：335评论：0推荐：0
摘要：Given a number N, return a string consisting of "0"s and "1"s that represents its value in base -2 (negative two). The returned string must have no le
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发表于 2019-05-29 15:53阅读：380评论：0推荐：0
摘要：On an infinite plane, a robot initially stands at (0, 0) and faces north. The robot can receive one of three instructions: "G": go straight 1 unit; "L
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发表于 2019-05-28 22:04阅读：285评论：0推荐：0
摘要：Given an array A of non-negative integers, the array is squareful if for every pair of adjacent elements, their sum is a perfect square. Return the nu
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发表于 2019-05-28 20:58阅读：317评论：0推荐：0
摘要：On a broken calculator that has a number showing on its display, we can perform two operations: Double: Multiply the number on the display by 2, or; D
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发表于 2019-05-27 22:35阅读：210评论：0推荐：0
摘要：Given an array A of positive lengths, return the largest perimeter of a triangle with non-zero area, formed from 3 of these lengths. If it is impossib
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发表于 2019-05-26 12:43阅读：230评论：0推荐：0
摘要：1051. Height Checker Students are asked to stand in non-decreasing order of heights for an annual photo. Return the minimum number of students not sta
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发表于 2019-05-24 22:13阅读：277评论：0推荐：0
摘要：Given a set of points in the xy-plane, determine the minimum area of any rectangle formed from these points, with sides not necessarily parallel to th
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发表于 2019-05-23 21:43阅读：203评论：0推荐：0
摘要：Given an array A of integers, for each integer A[i] we may choose any x with -K <= x <= K, and add x to A[i]. After this process, we have some array B
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发表于 2019-05-23 21:28阅读：347评论：0推荐：0
摘要：Let's say a positive integer is a superpalindrome if it is a palindrome, and it is also the square of a palindrome. Now, given two positive integers L
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发表于 2019-05-23 20:30阅读：266评论：0推荐：0
摘要：On a N * N grid, we place some 1 * 1 * 1 cubes. Each value v = grid[i][j] represents a tower of v cubes placed on top of grid cell (i, j). Return the
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发表于 2019-05-22 18:59阅读：262评论：0推荐：0
摘要：On a 2 dimensional grid with R rows and C columns, we start at (r0, c0) facing east. Here, the north-west corner of the grid is at the first row and c
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发表于 2019-05-21 16:46阅读：297评论：0推荐：0
摘要：Given the radius and x-y positions of the center of a circle, write a function randPoint which generates a uniform random point in the circle. Note: E
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发表于 2019-05-20 22:31阅读：251评论：0推荐：0
摘要：Starting with a positive integer N, we reorder the digits in any order (including the original order) such that the leading digit is not zero. Return
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发表于 2019-05-20 21:51阅读：294评论：0推荐：0
摘要：Find the smallest prime palindrome greater than or equal to N. Recall that a number is prime if it's only divisors are 1 and itself, and it is greater
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发表于 2019-05-19 15:21阅读：390评论：0推荐：0
摘要：1046. Last Stone Weight We have a collection of rocks, each rock has a positive integer weight. Each turn, we choose the two heaviest rocks and smash
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发表于 2019-05-18 22:33阅读：224评论：0推荐：0
摘要：There is a special square room with mirrors on each of the four walls. Except for the southwest corner, there are receptors on each of the remaining c
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发表于 2019-05-18 22:00阅读：210评论：0推荐：0
摘要：Given a positive integer N, how many ways can we write it as a sum of consecutive positive integers? Example 1: Example 2: Example 3: Note: 1 <= N <=
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发表于 2019-05-18 21:41阅读：210评论：0推荐：0
摘要：A rectangle is represented as a list [x1, y1, x2, y2], where (x1, y1) are the coordinates of its bottom-left corner, and (x2, y2) are the coordinates
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发表于 2019-05-17 21:59阅读：281评论：0推荐：0
摘要：You have a list of points in the plane. Return the area of the largest triangle that can be formed by any 3 of the points. Notes: 3 <= points.length <
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发表于 2019-05-17 20:56阅读：178评论：0推荐：0
摘要：In a given integer array A, we must move every element of A to either list B or list C. (B and C initially start empty.) Return true if and only if af
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发表于 2019-05-17 17:37阅读：306评论：0推荐：0
摘要：A Tic-Tac-Toe board is given as a string array board. Return True if and only if it is possible to reach this board position during the course of a va
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发表于 2019-05-17 17:00阅读：265评论：0推荐：0
摘要：You are playing a simplified Pacman game. You start at the point (0, 0), and your destination is (target[0], target[1]). There are several ghosts on t
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发表于 2019-05-16 22:34阅读：286评论：0推荐：0
摘要：There is a box protected by a password. The password is n digits, where each letter can be one of the first k digits 0, 1, ..., k-1. You can keep inpu
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发表于 2019-05-15 22:30阅读：280评论：0推荐：0
摘要：A move consists of taking a point (x, y) and transforming it to either (x, x+y) or (x+y, y). Given a starting point (sx, sy) and a target point (tx, t
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发表于 2019-05-15 22:08阅读：262评论：0推荐：0
摘要：You are standing at position 0 on an infinite number line. There is a goal at position target. On each move, you can either go left or right. During t
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发表于 2019-05-14 22:30阅读：223评论：0推荐：0
摘要：The set S originally contains numbers from 1 to n. But unfortunately, due to the data error, one of the numbers in the set got duplicated to another n
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发表于 2019-05-14 21:23阅读：195评论：0推荐：0
摘要：Given a non-negative integer c, your task is to decide whether there're two integers a and b such that a2 + b2 = c. Example 1: Example 2: Approach #1:
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发表于 2019-05-14 20:42阅读：227评论：0推荐：0
摘要：Given a string representing an expression of fraction addition and subtraction, you need to return the calculation result in string format. The final
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发表于 2019-05-14 20:05阅读：170评论：0推荐：0
摘要：Given the coordinates of four points in 2D space, return whether the four points could construct a square. The coordinate (x,y) of a point is represen
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发表于 2019-05-13 21:28阅读：214评论：0推荐：0
摘要：There are 1000 buckets, one and only one of them is poisonous, while the rest are filled with water. They all look identical. If a pig drinks the pois
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发表于 2019-05-12 22:07阅读：197评论：0推荐：0
摘要：Given a non-empty integer array of size n, find the minimum number of moves required to make all array elements equal, where a move is incrementing n
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发表于 2019-05-12 21:49阅读：238评论：0推荐：0
摘要：Given a non-empty string containing an out-of-order English representation of digits 0-9, output the digits in ascending order. Note: Example 1: Input
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发表于 2019-05-05 21:14阅读：274评论：0推荐：0
摘要：Find the nth digit of the infinite integer sequence 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, ... Note:n is positive and will fit within the range of a 32-bi
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发表于 2019-05-05 20:34阅读：215评论：0推荐：0
摘要：Given a positive integer n and you can do operations as follow: What is the minimum number of replacements needed for n to become 1? Example 1: Exampl
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发表于 2019-05-05 19:47阅读：197评论：0推荐：0
摘要：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
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发表于 2019-05-04 21:51阅读：224评论：0推荐：0
摘要：You are given two jugs with capacities x and y litres. There is an infinite amount of water supply available. You need to determine whether it is poss
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发表于 2019-05-04 17:31阅读：250评论：0推荐：0
摘要：You are given an array x of n positive numbers. You start at point (0,0) and moves x[0] metres to the north, then x[1] metres to the west, x[2] metres
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发表于 2019-05-03 15:28阅读：220评论：0推荐：0
摘要：There are n bulbs that are initially off. You first turn on all the bulbs. Then, you turn off every second bulb. On the third round, you toggle every
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发表于 2019-05-03 12:37阅读：290评论：0推荐：0
摘要：Given an integer n, count the total number of digit 1 appearing in all non-negative integers less than or equal to n. Example: Approach #1: Math. [Jav
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发表于 2019-05-03 11:32阅读：184评论：0推荐：0
摘要：Implement a basic calculator to evaluate a simple expression string. The expression string may contain open ( and closing parentheses ), the plus + or
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发表于 2019-05-01 11:24阅读：283评论：0推荐：0
摘要：We are given that the string "abc" is valid. From any valid string V, we may split V into two pieces X and Y such that X + Y (X concatenated with Y) i
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发表于 2019-05-01 11:07阅读：356评论：0推荐：0
摘要：You have an array of logs. Each log is a space delimited string of words. For each log, the first word in each log is an alphanumeric identifier. Then
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