给定一组非负整数,重新排列它们的顺序使之组成一个最大的整数. 示例 1: 输入: [10,2] 输出: 210 示例 2: 输入: [3,30,34,5,9] 输出: 9534330 说明: 输出结果可能非常大,所以你需要返回一个字符串而不是整数. 这道题目非常有意思.读完题之后,我们可以得到一个初步的方案:由于无论怎么排,最佳的方案肯定是会把所有的数字全部用上.所以,如果字典序越大的,得到的数值也会越大.只需要尽可能的让字典序大的数字处于尽可能高的位置即可.那么一个初步的实现方案如下 clas…

Combination Sum Combination Sum Total Accepted: 25850 Total Submissions: 96391 My Submissions Question Solution Given a set of candidate numbers (C) and a target number (T), find all unique combinations in C where the candidate numbers sums to T. The…

全排列问题.经常使用的排列生成算法有序数法.字典序法.换位法(Johnson(Johnson-Trotter).轮转法以及Shift cursor cursor* (Gao & Wang)法. [题目] Given a collection of numbers, return all possible permutations. For example, [1,2,3] have the following permutations: [1,2,3], [1,3,2], [2,1,3], [2…

以前从来没有写过解题报告,只是看到大肥羊河delta写过不少.最近想把写博客的节奏给带起来,所以就挑一个比较容易的题目练练手. 原题链接 https://leetcode.com/problems/course-schedule/ 题目大意 有n个课程,编号分别是0到n-1.我们的目标是修完所有课程.然而有些课程有前置课程的,我们必须修完前置课程才能修该门课程.题目给了我们课程之间的前置关系,让我们判断是否能修完所有课程. 题目原型 这个题目的描述简单粗暴,我们不难发现,其实是给了我们一个有向图…

179. 最大数 179. Largest Number 题目描述 给定一组非负整数,重新排列它们的顺序使之组成一个最大的整数. 每日一算法2019/5/24Day 21LeetCode179. Largest Number 示例 1: 输入: [10,2] 输出: 210 示例 2: 输入: [3,30,34,5,9] 输出: 9534330 说明: 输出结果可能非常大,所以你需要返回一个字符串而不是整数. Java 实现 import java.util.Arrays; import jav…

Sort ColorsGiven an array with n objects colored red, white or blue, sort them so that objects of the same color are adjacent, with the colors in the order red, white and blue. Here, we will use the integers 0, 1, and 2 to represent the color red, wh…

179. 最大数 给定一组非负整数,重新排列它们的顺序使之组成一个最大的整数. 示例 1: 输入: [10,2] 输出: 210 示例 2: 输入: [3,30,34,5,9] 输出: 9534330 说明: 输出结果可能非常大,所以你需要返回一个字符串而不是整数. class Solution { /** * @param nums 一组非负整数 * @return - String.compareTo() 是按照 lexicographically, 字典顺序排列的 * - 利用compar…

最大数 力扣 给定一组非负整数,重新排列它们的顺序使之组成一个最大的整数. 示例 1: 输入: [10,2] 输出: 210 示例 2: 输入: [3,30,34,5,9] 输出: 9534330 说明: 输出结果可能非常大,所以你需要返回一个字符串而不是整数. eoj 18年复试机试真题 单点时限: 1.0 sec 内存限制: 256 MB 我想和你在一起 直到我不爱你 宝贝 人和人 一场游戏 我愿意为你死去 如果我还爱你 宝贝 反正活着 也没意义 宝贝 我也只能 这样为你 --李志<和你在一…

题目描述 给定一组非负整数,重新排列它们的顺序使之组成一个最大的整数. 示例 1: 输入: [10,2] 输出: 210 示例 2: 输入: [3,30,34,5,9] 输出: 9534330 说明: 输出结果可能非常大,所以你需要返回一个字符串而不是整数. 解题思路 组成最大数应使得高位数字尽量大,所以首先按照高位数字从大到小对数组排序,然后一次从高位到低位组成最大数.注意若数组全为0,则直接返回一个0. 代码 class Solution { public: string largestNu…

Permutation Sequence https://oj.leetcode.com/problems/permutation-sequence/ The set [1,2,3,…,n] contains a total of n! unique permutations. By listing and labeling all of the permutations in order, We get the following sequence (ie, for n = 3): "123&…

Interleaving StringGiven s1, s2, s3, find whether s3 is formed by the interleaving of s1 and s2. For example,Given:s1 = "aabcc",s2 = "dbbca", When s3 = "aadbbcbcac", return true.When s3 = "aadbbbaccc", return false.…

Scramble String Given a string s1, we may represent it as a binary tree by partitioning it to two non-empty substrings recursively. Below is one possible representation of s1 = "great": great / \ gr eat / \ / \ g r e at / \ a t To scramble the s…

Gas Station There are N gas stations along a circular route, where the amount of gas at station i is gas[i]. You have a car with an unlimited gas tank and it costs cost[i] of gas to travel from station i to its next station (i+1). You begin the journ…

Given a string s, partition s such that every substring of the partition is a palindrome. Return all possible palindrome partitioning of s. For example, given s = "aab",Return [    ["aa","b"],    ["a","a",…

Sort List Sort a linked list in O(n log n) time using constant space complexity. 使用Merge Sort, 空间复杂度是 O(logN) 因为使用了栈空间. SOLUTION 1: 使用Merge Sort来解决问题. 为什么不用QuickSort? 因为随机访问对于链表而言太耗时,而heap sort不可行. 注意,Find Mid用了2种解法.或者是让Fast提前结束,或是让Fast先走一步,目的就是要取得中间…

Wildcard MatchingImplement wildcard pattern matching with support for '?' and '*'. '?' Matches any single character.'*' Matches any sequence of characters (including the empty sequence). The matching should cover the entire input string (not partial)…

Maximal RectangleGiven a 2D binary matrix filled with 0's and 1's, find the largest rectangle containing all ones and return its area. Show TagsHave you met this question in a real interview? Yes  NoDiscussSOLUTION 1: public class Solution { public i…

Merge IntervalsGiven a collection of intervals, merge all overlapping intervals. For example,Given [1,3],[2,6],[8,10],[15,18],return [1,6],[8,10],[15,18]. SOLUTION 1: 1. 先使用Comparator 的匿名类对intervels进行排序. 2. 把Intervals遍历一次,依次一个一个merge到第1个interval. 把第1…

最大数 给定一组非负整数,重新排列它们的顺序使之组成一个最大的整数. 示例 1: 输入: [10,2] 输出: 210 示例 2: 输入: [3,30,34,5,9] 输出: 9534330 import java.util.Arrays; import java.util.Comparator; class Solution { public String largestNumber(int[] num) { if(null==num||num.length<1) return "&qu…

P1198 [JSOI2008]最大数 题目描述 现在请求你维护一个数列,要求提供以下两种操作: 1. 查询操作. 语法:Q L 功能:查询当前数列中末尾L个数中的最大的数,并输出这个数的值. 限制:\(L\)不超过当前数列的长度.\((L > 0)\) 2. 插入操作. 语法:A n 功能:将\(n\)加上\(t\),其中\(t\)是最近一次查询操作的答案(如果还未执行过查询操作,则\(t=0\)),并将所得结果对一个固定的常数\(D\)取模,将所得答案插入到数列的末尾. 限制:\(n\)是整…

A robot is located at the top-left corner of a m x n grid (marked 'Start' in the diagram below). The robot can only move either down or right at any point in time. The robot is trying to reach the bottom-right corner of the grid (marked 'Finish' in t…

[题目] Given an array S of n integers, are there elements a, b, c, and d in S such that a + b + c + d = target? Find all unique quadruplets in the array which gives the sum of target. Note: Elements in a quadruplet (a,b,c,d) must be in non-descending o…

Largest Number Given a list of non negative integers, arrange them such that they form the largest number. For example, given [3, 30, 34, 5, 9], the largest formed number is 9534330. Note: The result may be very large, so you need to return a string…

Next Permutation Implement next permutation, which rearranges numbers into the lexicographically next greater permutation of numbers. If such arrangement is not possible, it must rearrange it as the lowest possible order (ie, sorted in ascending orde…

Valid Parentheses Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid. The brackets must close in the correct order, "()" and "()[]{}" are all valid but "(]" a…

Sqrt(x) Implement int sqrt(int x). Compute and return the square root of x. SOLUTION 1: 参见:二分法总结,以及模板:http://t.cn/RZGkPQc public class Solution { public int sqrt(int x) { if (x == 1 || x == 0) { return x; } int left = 1; int right = x; while (left <…

Distinct Subsequences Given a string S and a string T, count the number of distinct subsequences of T in S. A subsequence of a string is a new string which is formed from the original string by deleting some (can be none) of the characters without di…

Valid Palindrome Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases. For example,"A man, a plan, a canal: Panama" is a palindrome."race a car" is not a palindrome. Note:Have you…

Edit Distance Given two words word1 and word2, find the minimum number of steps required to convert word1 to word2. (each operation is counted as 1 step.) You have the following 3 operations permitted on a word: a) Insert a characterb) Delete a chara…

Maximum Subarray Find the contiguous subarray within an array (containing at least one number) which has the largest sum. For example, given the array [−2,1,−3,4,−1,2,1,−5,4],the contiguous subarray [4,−1,2,1] has the largest sum = 6. SOLUTION 1: 采用滑…