Write a program to find the n-th ugly number. Ugly numbers are positive numbers whose prime factors only include 2, 3, 5. Example: Input: n = 10 Output: 12 Explanation: 1, 2, 3, 4, 5, 6, 8, 9, 10, 12 is the sequence of the first 10 ugly numbers. Note…
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 of size k. Example: Input: n = 12, primes = [2,7,13,19] Output: 32 Explanation: [1,2,4,7,8,13,14,16,…
// ConsoleApplication1.cpp : 定义控制台应用程序的入口点. // #include "stdafx.h" #include<iostream> #include<vector> using namespace std; class Solution { public: int GetUglyNumber_Solution(int index) { int Max = 0;//记录最大丑数 int num = 0; vector<…
2018-07-28 15:30:21 一.判断是否为丑数 问题描述: 问题求解: 所谓丑数,首先得是正数,然后其质数因子只包含了2,3,4,因此我们只需要对当前的数分别除2,3,4直到不能除为止. public boolean isUgly(int num) { if (num > 0) { for (int i = 2; i < 6; i++) { while (num % i == 0) num /= i; } } return num == 1; } 二.第n个丑数 问题描述: 问题求…