摘要： Given k sorted integer arrays, merge them into one sorted array. Given 3 sorted arrays: return [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11]. 这题和merge k sort 阅读全文

摘要： Write a program to find the nth super ugly number. Super ugly numbers are positive numbers whose all prime factors are in the given prime list primes 阅读全文

摘要： Ugly number is a number that only have factors 2, 3 and 5. Design an algorithm to find the nth ugly number. The first 10 ugly numbers are 1, 2, 3, 4, 阅读全文

摘要： Given a 2D binary matrix filled with 0's and 1's, find the largest rectangle containing all ones and return its area. Subscribe to see which companies 阅读全文

摘要： The size of the hash table is not determinate at the very beginning. If the total size of keys is too large (e.g. size >= capacity / 10), we should do 阅读全文

摘要： Given an integer array with no duplicates. A max tree building on this array is defined as follow: The root is the maximum number in the array The lef 阅读全文

摘要： In data structure Hash, hash function is used to convert a string(or any other type) into an integer smaller than hash size and bigger or equal to zer 阅读全文

摘要： Given a 2D binary matrix filled with 0's and 1's, find the largest square containing all 1's and return its area. For example, given the following mat 阅读全文

摘要： Given n non-negative integers representing the histogram's bar height where the width of each bar is 1, find the area of largest rectangle in the hist 阅读全文

摘要： Given a 2d grid map of '1's (land) and '0's (water), count the number of islands. An island is surrounded by water and is formed by connecting adjacen 阅读全文