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摘要： 题目描述 Given an unsorted array nums, reorder it such that nums[0] < nums[1] > nums[2] < nums[3].... 题目大意 将数组中的数字重新排序，满足nums[0] < nums[1] > nums[2] < num 阅读全文

摘要： 题目描述 Given two arrays of length m and n with digits 0-9 representing two numbers. Create the maximum number of length k <= m + n from digits of the tw 阅读全文

摘要： 题目描述 Given a string array words, find the maximum value of length(word[i]) * length(word[j]) where the two words do not share common letters. You may 阅读全文

摘要： 题目描述 Given a string which contains only lowercase letters, remove duplicate letters so that every letter appear once and only once. You must make sure 阅读全文

摘要： 题目描述 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 pr 阅读全文

摘要： 题目描述 For an undirected graph with tree characteristics, we can choose any node as the root. The result graph is then a rooted tree. Among all possible 阅读全文

摘要： 题目描述 Given an integer array nums, find the sum of the elements between indices i and j (i ≤ j), inclusive. The update(i, val) function modifies nums b 阅读全文

摘要： 题目描述 Additive number is a string whose digits can form additive sequence. A valid additive sequence should contain at least three numbers. Except for 阅读全文

摘要： 题目描述 Remove the minimum number of invalid parentheses in order to make the input string valid. Return all possible results. Note: The input string may 阅读全文

摘要： 题目描述 You are playing the following Bulls and Cows game with your friend: You write down a number and ask your friend to guess what the number is. Each 阅读全文