A positive integer is magical if it is divisible by either A or B. Return the N-th magical number.  Since the answer may be very large, return it modulo 10^9 + 7. Example 1: Input: N = 1, A = 2, B = 3 Output: 2 Example 2: Input: N = 4, A = 2, B = 3 O…

A positive integer is magical if it is divisible by either A or B. Return the N-th magical number.  Since the answer may be very large, return it modulo 10^9 + 7. Example 1: Input: N = 1, A = 2, B = 3 Output: 2 Example 2: Input: N = 4, A = 2, B = 3 O…

题目如下: 解题思路:本题求的是第N个Magical Number,我们可以很轻松的知道这个数的取值范围 [min(A,B), N*max(A,B)].对于知道上下界求具体数字的题目,可以考虑用二分查找.这样题目就从找出第N个Magical Number变成判断一个数是否是第N个Magical Number.假设n是其中一个Magical Number,显然n满足 n % A == 0 或者 n % B == 0.对于A来说,从A到n之间有n/A个Magical Number,而对B来说是n/B…

A positive integer is magical if it is divisible by either A or B. Return the N-th magical number.  Since the answer may be very large, return it modulo 10^9 + 7. Example 1: Input: N = 1, A = 2, B = 3 Output: 2 Example 2: Input: N = 4, A = 2, B = 3 O…

Description e Tribonacci sequence Tn is defined as follows: T0 = 0, T1 = 1, T2 = 1, and Tn+3 = Tn + Tn+1 + Tn+2 for n >= 0. Given n, return the value of Tn. Example 1: Input: n = 4 Output: 4 Explanation: T_3 = 0 + 1 + 1 = 2 T_4 = 1 + 1 + 2 = 4 Exampl…

leetcode 400. Nth Digit 在线提交网址: https://leetcode.com/problems/nth-digit/ Total Accepted: 4356 Total Submissions: 14245 Difficulty: Easy 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 w…

标签(空格分隔): LeetCode 作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ https://leetcode.com/problems/ugly-number-ii/ Total Accepted: 12227 Total Submissions: 54870 Difficulty: Medium Question Write a program to find the n-th ugly number. Ugly num…

[LeetCode]481. Magical String 解题报告(Python) 标签(空格分隔): LeetCode 作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 题目地址:https://leetcode.com/problems/magical-string/description/ 题目描述: A magical string S consists of only '1' and '2' and obeys the f…

根据CC150的解决方式和Introduction to Java programming总结: 使用了两种方式,递归和迭代 CC150提供的代码比较简洁,不过某些细节需要分析. 现在直接运行代码,输入n(其中用number代替,以免和方法中的n混淆)的值,可以得出斐波那契数. 代码如下: /* CC150 8.1 Write a method to generate the nth Fibonacci number Author : Mengyang Rao note : Use two me…

一天一道LeetCode 本系列文章已全部上传至我的github,地址:ZeeCoder's Github 欢迎大家关注我的新浪微博,我的新浪微博 欢迎转载,转载请注明出处 (一)题目 Given an array of numbers nums, in which exactly two elements appear only once and all the other elements appear exactly twice. Find >the two elements that a…