台部落星星斋

You are given an n x n 2D matrix representing an image. Rotate the image by 90 degrees (clockwise). Follow up: Could

2020-06-25 04:00:11

Follow up for N-Queens problem. Now, instead outputting board configurations, return the total number of distinct so

2020-06-25 04:00:11

Implement pow(x, n). 這道題最慢時間複雜度也是O(n)，快一些的是O（logn），主要是將n考慮爲二進制的形式，某一位是1的話，就乘上相應的次方數即可。代碼如下： public class Solution {

2020-06-25 04:00:11

Given an array of strings, group anagrams together. For example, given: ["eat", "tea", "tan", "ate", "nat", "bat"],

2020-06-25 04:00:01

Given two binary strings, return their sum (also a binary string). For example, a = "11" b = "1" Return "100". 這道題也

2020-06-07 19:54:57

Given a m x n grid filled with non-negative numbers, find a path from top left to bottom right which minimizes the sum

2020-06-07 19:54:57

Given a set of candidate numbers (C) and a target number (T), find all unique combinations in C where the candidate

2020-02-23 13:00:24

Determine if a Sudoku is valid, according to: Sudoku Puzzles - The Rules. The Sudoku board could be partially filled

2020-02-23 13:00:24

Given two numbers represented as strings, return multiplication of the numbers as a string. Note: The numbers can be

2020-02-23 13:00:24

Write a program to solve a Sudoku puzzle by filling the empty cells. Empty cells are indicated by the character '.'.

2020-02-23 13:00:24

Given a collection of numbers that might contain duplicates, return all possible unique permutations. For example,

2020-02-23 13:00:24

Given a sorted array of integers, find the starting and ending position of a given target value. Your algorithm's ru

2020-02-23 13:00:24

Given n non-negative integers representing an elevation map where the width of each bar is 1, compute how much water i

2020-02-23 13:00:24

The n-queens puzzle is the problem of placing n queens on an n×n chessboard such that no two queens attack each other

2020-02-23 13:00:24

Implement wildcard pattern matching with support for '?' and '*'. '?' Matches any single character. '*' Matches any se

2020-02-23 13:00:24