Given an m x n matrix. If an element is 0, set its entire row and column to 0. Do it in-place.
1496. Path Crossing
Return True if the path crosses itself at any point, that is, if at any time you are on a location you've previously visited. Return False otherwise.
680. Valid Palindrome II
Given a non-empty string s, you may delete at most one character. Judge whether you can make it a palindrome.
String - 71. Simplify Path
Given an absolute path for a file (Unix-style), simplify it. Or in other words, convert it to the canonical path.
String - 67. Add Binary
Given two binary strings, return their sum (also a binary string).
Math - 50. Pow(x, n)
Implement pow(x, n), which calculates x raised to the power n (xn).
String - 44. Wildcard Matching
Given an input string (s) and a pattern (p), implement wildcard pattern matching with support for '?' and '*'.
DFS&BFS - 37. Sudoku Solver
Write a program to solve a Sudoku puzzle by filling the empty cells.
Array - 36. Valid Sudoku
Determine if a 9x9 Sudoku board is valid.
Array - 57. Insert Interval
Given a set of non-overlapping intervals, insert a new interval into the intervals (merge if necessary).
Binary Search - 378. Kth Smallest Element in a Sorted Matrix
Given a n x n matrix where each of the rows and columns are sorted in ascending order, find the kth smallest element in the matrix.
Array - 59. Spiral Matrix II
Given a positive integer n, generate a square matrix filled with elements from 1 to n2 in spiral order.
Array - 54. Spiral Matrix
Given a matrix of m x n elements (m rows, n columns), return all elements of the matrix in spiral order.
LinkedList - 876. Middle of the Linked List
Given a non-empty, singly linked list with head node head, return a middle node of linked list.
Array - 48. Rotate Image
You are given an n x n 2D matrix representing an image. Rotate the image by 90 degrees (clockwise).
string- 43. Multiply Strings
Given two non-negative integers num1 and num2 represented as strings, return the product of num1 and num2, also represented as a string.
Array - 34. Find First and Last Position of Element in Sorted Array
Given an array of integers nums sorted in ascending order, find the starting and ending position of a given target value.
Array - 31. Next Permutation
Implement next permutation, which rearranges numbers into the lexicographically next greater permutation of numbers.
String - 8. String to Integer (atoi)
8.String to Integer (atoi) Implement atoi which converts a string to an integer. The function first discards as many whitespace characters as necessary until the first non-whitespace character is found. Then, starting from this character, takes an optional initial plus or minus sign followed by as many numerical digits as possible, and interprets them as a numerical value. The string can contain additional characters after those that form the integral number, which are ignored and have no effect....