We have a sorted set of digits D, a non-empty subset of {'1','2','3','4','5','6','7','8','9'}.  (Note that '0' is not included.) Now, we write numbers using these digits, using each digit as many times as we want.  For example, if D = {'1','3','5'},…

应该是常数 N的位数时间级别 我的这个方法超时很严重...但是特此记录 费劲巴拉写的... 超时: int atMostNGivenDigitSet(char** D, int DSize, int N) { int *array = (int *)malloc(sizeof(int) * 10); for (int i = 0; i < 10; i ++) array[i] = 0; for (int j = 1; j < 10; j ++) { if (j - 1 < DSize)…

We have a sorted set of digits D, a non-empty subset of {'1','2','3','4','5','6','7','8','9'}.  (Note that '0' is not included.) Now, we write numbers using these digits, using each digit as many times as we want.  For example, if D = {'1','3','5'},…

We have a sorted set of digits D, a non-empty subset of {'1','2','3','4','5','6','7','8','9'}.  (Note that '0' is not included.) Now, we write numbers using these digits, using each digit as many times as we want.  For example, if D = {'1','3','5'},…

Given a non-negative integer n, count all numbers with unique digits, x, where 0 ≤ x < 10n. Example: Given n = 2, return 91. (The answer should be the total numbers in the range of 0 ≤ x < 100, excluding [11,22,33,44,55,66,77,88,99]) Hint: A direct…

Write a SQL query to find all numbers that appear at least three times consecutively. +----+-----+ | Id | Num | +----+-----+ | 1 | 1 | | 2 | 1 | | 3 | 1 | | 4 | 2 | | 5 | 1 | | 6 | 2 | | 7 | 2 | +----+-----+ For example, given the above Logs table, 1…

Given a non-negative integer n, count all numbers with unique digits, x, where 0 ≤ x < 10n. Example: Given n = 2, return 91. (The answer should be the total numbers in the range of 0 ≤ x < 100, excluding [11,22,33,44,55,66,77,88,99]) Analysis: A num…

1. 题目名称   Consecutive Numbers 2 .题目地址 https://leetcode.com/problems/consecutive-numbers/ 3. 题目内容 写一个SQL,查处表Logs中连续出现至少3次的数字:(考察的知识点主要是多个表之间的连接) ----+-----+ | Id | Num | +----+-----+ | | | | | | | +----+-----+ 比如上表中,写出的结果是1. 4. 解题思路 解法一:直接使用一套SELECT -…

题目: We have a sorted set of digits D, a non-empty subset of {'1','2','3','4','5','6','7','8','9'}.  (Note that '0' is not included.) Now, we write numbers using these digits, using each digit as many times as we want.  For example, if D = {'1','3','5…

Given an integer n, return 1 - n in lexicographical order. For example, given 13, return: [1,10,11,12,13,2,3,4,5,6,7,8,9]. Please optimize your algorithm to use less time and space. The input size may be as large as 5,000,000. 这道题给了我们一个整数n,让我们把区间[1,n…

Given an integer n, return 1 - n in lexicographical order. For example, given 13, return: [1,10,11,12,13,2,3,4,5,6,7,8,9]. Please optimize your algorithm to use less time and space. The input size may be as large as 5,000,000. Solution 1: If we look…

Determine whether an integer is a palindrome. Do this without extra space. 尝试用两头分别比较的方法,结果发现无法解决1000021这种问题 public class Solution { public boolean isPalindrome(int x) { if(x<0) return false; int lastbit=x%10; int firstbit; int num=x; int bits=0; whil…

Description: Write a SQL query to find all numbers that appear at least three times consecutively. +----+-----+ | Id | Num | +----+-----+ | 1 | 1 | | 2 | 1 | | 3 | 1 | | 4 | 2 | | 5 | 1 | | 6 | 2 | | 7 | 2 | +----+-----+ For example, given the above…

Find the nth digit of the infinite integer sequence 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, ... Note:n is positive and will fit within the range of a 32-bit signed integer (n < 231). Example 1: Input: 3 Output: 3 Example 2: Input: 11 Output: 0 Explanation…

复习了一下数位dp 肯定不包含0,但是通常数位dp最后计算的结果较小的是包含前导0的,只是没显示出来而已,所以这题需要前导0,但是非前导0是不需要算进去的,因此,加个是否是前导0的状态即可 class Solution { public: ]; unordered_map<string,int> mp; vector<int> dp; int dfs(int p,bool e,bool zero){ ) ; ) return dp[p]; ; ; ;i<=u;i++){ ,i…

2019-10-14 22:21:29 问题描述: 问题求解: 暴力求解必然会超时,那么就需要考虑数学的方法来降低时间复杂度了. public int atMostNGivenDigitSet(String[] D, int N) { int n = D.length; int res = 0; char[] chs = new char[n]; for (int i = 0; i < n; i++) { chs[i] = D[i].charAt(0); } char[] nums = Stri…

All LeetCode Questions List(Part of Answers, still updating) 题目汇总及部分答案(持续更新中) Leetcode problems classified by company 题目按公司分类(Last updated: October 2, 2017) .   Top Interview Questions # Title Difficulty Acceptance 1 Two Sum Medium 17.70% 2 Add Two N…

# Title Solution Acceptance Difficulty Frequency     4 Median of Two Sorted Arrays       27.2% Hard     10 Regular Expression Matching       25.6% Hard     23 Merge k Sorted Lists       35.8% Hard     25 Reverse Nodes in k-Group       37.7% Hard    …

请点击页面左上角 -> Fork me on Github 或直接访问本项目Github地址:LeetCode Solution by Swift    说明:题目中含有$符号则为付费题目. 如:[Swift]LeetCode156.二叉树的上下颠倒 $ Binary Tree Upside Down 请下拉滚动条查看最新 Weekly Contest!!! Swift LeetCode 目录 | Catalog 序        号 题名Title 难度     Difficulty  两数之…

463. Island Perimeterhttps://leetcode.com/problems/island-perimeter/就是逐一遍历所有的cell,用分离的cell总的的边数减去重叠的边的数目即可.在查找重叠的边的数目的时候有一点小技巧,就是沿着其中两个方向就好,这种题目都有类似的规律,就是可以沿着上三角或者下三角形的方向来做.一刷一次ac,但是还没开始注意codestyle的问题,需要再刷一遍. class Solution { public: int islandPerime…

http://codeforces.com/contest/747/problem/F cf #387 div2 problem f 非常好的一道题.看完题,然后就不知道怎么做,感觉是dp,但是不知道怎么枚举.还有就是一般求第k小的思路一般是什么?对这类题目理解的不是很好. 这道题,跟上一篇的题解里面写的hdu 1002 递增数的题目的解法差不多,但是底层的求解需要花一些时间去推敲! 不会做,就看官方题解,看不懂说的什么.就从下面的讨论找大神的题解. I can describe my solu…

1 题目:2.2.1 Add Two Numbers You are given two linked lists representing two non-negative numbers. The digits are stored in reverse order and each of their nodes contain a single digit. Add the two numbers and return it as a linked list. Input: (2 -> 4…

Determine whether an integer is a palindrome. Do this without extra space. click to show spoilers. Some hints: Could negative integers be palindromes? (ie, -1) If you are thinking of converting the integer to string, note the restriction of using ext…

一天一道LeetCode (一)题目 Given a digit string, return all possible letter combinations that the number could represent. A mapping of digit to letters (just like on the telephone buttons) is given below. Input:Digit string "23" Output: ["ad",…

http://www.intel.com/content/www/us/en/processors/processor-numbers.html About Intel® Processor Numbers The processor number is one of several factors, along with processor brand, specific system configurations, and system-level benchmarks, to be con…

Given a 32-bit signed integer, reverse digits of an integer. Example 1: Input: 123 Output: 321 Example 2: Input: -123 Output: -321 Example 3: Input: 120 Output: 21 Note:Assume we are dealing with an environment which could only store integers within…

1289. One Way Ticket Time limit: 1.0 secondMemory limit: 64 MB A crowed of volunteers dressed in the star striped overalls have filled the starport. There starcraft leaves to the thorium mines of Haron. Their job will be hard and dangerous. Will many…

1003: All Your Base Time Limit: 1 Sec      Memory Limit: 128 MB Submit: 4      Solved: 2 Description Premise: Given a specification for a “base” (well, actually a mixed radix number system), take in pairs of numbers written in our “base”, perform a s…

结对项目:数独扩展 1. Github项目地址 https://github.com/Slontia/Sudoku2 2. PSP估计表格 3. 关于Information Hiding, Interface Design, Loose Coupling的设计 首先,在王辰昱同学的提醒下,我们将一开始的代码按照功能分为若干个.cpp文件,每一个.cpp只处理一件事,如create_puzzle.cpp文件负责生成数独,而solve.cpp文件负责解决数独,在一定程度上保证了代码的低耦合性. 我认…

D. Rat Kwesh and Cheese 题目连接: http://www.codeforces.com/contest/621/problem/D Description Wet Shark asked Rat Kwesh to generate three positive real numbers x, y and z, from 0.1 to 200.0, inclusive. Wet Krash wants to impress Wet Shark, so all generat…