38 docs tagged with "Arrays"

Given a list of accounts where each element accounts[i] is a list of strings, where the first element accounts[i][0] is a name, and the rest of the elements are emails representing emails of the account.

Given two binary strings a and b, return their sum as a binary string.

We are given an array asteroids of integers representing asteroids in a row.

Given an integer array nums, return true if any value appears at least twice in the array, and return false if every element is distinct.

Given a binary array nums, return the maximum length of a contiguous subarray with an equal number of 0 and 1.

You are given a 0-indexed 1-dimensional (1D) integer array original, and two integers, m and n. You are tasked with creating a 2-dimensional (2D) array with m rows and n columns using all the elements from original.

Given an array of integers temperatures represents the daily temperatures, return an array answer such that answer[i] is the number of days you have to wait after the ith day to get a warmer temperature.

You are given an array of strings tokens that represents an arithmetic expression in a Reverse Polish Notation.

Given an integer array nums of length n where all the integers of nums are in the range [1, n] and each integer appears once or twice, return an array of all the integers that appears twice.

Given an array nums of n integers where nums[i] is in the range [1,n], return an array of all the integers in the range [1,n] that do not appear in nums.

There is only one repeated number in nums, return this repeated number.

Given an unsorted integer array nums, return the smallest missing positive integer.

Given an array of strings strs, group the anagrams together. You can return the answer in any order.

Given an array of integers heights representing the histogram's bar height where the width of each bar is 1, return the area of the largest rectangle in the histogram.

Write a function to find the longest common prefix string amongst an array of strings.

Given an unsorted array of integers nums, return the length of the longest consecutive elements sequence.

Given a string s which consists of lowercase or uppercase letters, return the length of the longest palindrome that can be built with those letters.

Given an array nums of size n, return the majority element.

Design a stack that supports push, pop, top, and retrieving the minimum element in constant time.

Given an array nums containing n distinct numbers in the range [0, n], return the only number in the range that is missing from the array.

Given an integer array nums, move all 0's to the end of it while maintaining the relative order of the non-zero elements.

Write a function that takes an unsigned integer and returns the number of '1' bits it has (also known as the Hamming weight).

Given an integer x, return true if x is a palindrome, and false otherwise.

Given an integer array nums, return an array answer such that answer[i] is equal to the product of all the elements of nums except nums[i].

Calculate the sum of the elements of nums between indices left and right inclusive where left <= right.

Given two strings ransomNote and magazine, return true if ransomNote can be constructed by using the letters from magazine and false otherwise.

Given a roman numeral, convert it to an integer.

Given an integer array nums, rotate the array to the right by k steps, where k is non-negative.

You have to rotate the image in-place, which means you have to modify the input 2D matrix directly.

Given an m x n integer matrix matrix, if an element is 0, set its entire row and column to 0's.

Given a non-empty array of integers nums, every element appears twice except for one. Find that single one.

Given an m x n matrix, return all elements of the matrix in spiral order.

Implement the myAtoi(string s) function, which converts a string to a 32-bit signed integer (similar to C/C++'s atoi function).

Given an array of integers nums and an integer k, return the total number of subarrays whose sum equals to k.

Given an array of integers nums and an integer target, return indices of the two numbers such that they add up to target.

Given two strings s and t, return true if t is an anagram of s, and false otherwise.

Given a string s containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid.

Determine if a 9 x 9 Sudoku board is valid.