一.Ugly Number Write a program to check whether a given number is an ugly number. Ugly numbers are positive numbers whose prime factors only include 2, 3, 5. For example, 6, 8 are ugly while 14 is not ugly since it includes another prime factor 7. Not…

263. Ugly Number 注意:1.小于等于0都不属于丑数 2.while循环的判断不是num >= 0, 而是能被2 .3.5整除,即能被整除才去除这些数 class Solution { public: bool isUgly(int num) { ) return false; == ) num /= ; == ) num /= ; == ) num /= ; ? true : false; } }; 264. Ugly Number II 用一个数组去存第n个前面的所有整数,然后…

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 sizek. For example, [1, 2, 4, 7, 8, 13, 14, 16, 19, 26, 28, 32] is the sequence of the first 12 s…

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. For example, [1, 2, 4, 7, 8, 13, 14, 16, 19, 26, 28, 32] is the sequence of the first 12…

题目: 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. For example, [1, 2, 4, 7, 8, 13, 14, 16, 19, 26, 28, 32] is the sequence of the first…

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. For example, [1, 2, 4, 7, 8, 13, 14, 16, 19, 26, 28, 32] is the sequence of the first 12…

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,…

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. For example, [1, 2, 4, 7, 8, 13, 14, 16, 19, 26, 28, 32] is the sequence of the first 12…

Super Ugly Number 最后WA没做出来. typedef long long int64; #define MAXBOUND 10000000 class Solution { public: int nthSuperUglyNumber(int n, vector<int>& primes) { bitset<MAXBOUND> bs; int64 bound = MAXBOUND; vector<int> v; bs.set(1); for (…

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,…

Write a program to check whether a given number is an ugly number. Ugly numbers are positive numbers whose prime factors only include 2, 3, 5. For example, 6, 8 are ugly while 14 is not ugly since it includes another prime factor 7. Note that 1 is ty…

Leetcode之动态规划(DP)专题-264. 丑数 II(Ugly Number II) 编写一个程序,找出第 n 个丑数. 丑数就是只包含质因数 2, 3, 5 的正整数. 示例: 输入: n = 10 输出: 12 解释: 1, 2, 3, 4, 5, 6, 8, 9, 10, 12 是前 10 个丑数. 说明: 1 是丑数. n 不超过1690. dp含义: dp[i]表示第i-1个丑数. class Solution { public int nthUglyNumber(int n)…

▶ 三个与丑数相关的问题 ▶ 第 263题,判定一个数字是否是丑数,即其素因子是否仅由 2,3,5 构成. ● 常规消除判别,4 ms class Solution { public: bool isUgly(int num) { ) return false; ); num /= ); ); num /= ); ); num /= ); ; } }; ● 递归方法,6 ms class Solution { public: bool isUgly(int num) { ) return fal…

有时候,你会在ORACLE数据库的告警日志中发现"Thread <number> cannot allocate new log, sequence <number>  Checkpoint not complete"这类告警.具体案例如下所示: Thread 1 cannot allocate new log, sequence 279334 Checkpoint not complete Current log# 4 seq# 279333 mem# 0:…

how to convert a number to a number array in javascript without convert number to a string 如何在不将数字转换为一个字符串的情况下将一数字转换为javascript中的一个数字数组 Number To Array Math.round 四舍五入 bug "use strict"; /** * * @author xgqfrms * @license MIT * @copyright xgqfrms…

丑数系列的题看这一道就可以了 /* 和ugly number2差不多,不过这次的质因子多了,所以用数组来表示质因子的target坐标 target坐标指的是这个质因子此次要乘的前任丑数是谁 */ public int nthSuperUglyNumber(int n, int[] primes) { //记录相乘坐标,存的是每个质因子对应相乘搭档在丑数数组中的下标 int[] target = new int[primes.length]; //动态规划数组 int[] dp = new int…

用了优先队列,还是超时 class Solution { public: int nthSuperUglyNumber(int n, vector<int>& primes) { priority_queue<int,std::vector<int>,std::greater<int> > pq; pq.push(1); int i=1; int t; while(i<=n){ if(t == pq.top()) { pq.pop(); con…

eg 2,3,5 把第一个元素(2,1)放到最小堆,2表示乘积,1表示乘数   乘数     队列                          最小堆                   即将进行的操作 第一阶段 [1]   [2,3,5]                2                          (2,1)出堆,(3,1)入堆,生成新的乘数2,并且(2*2,2)入堆: 第二阶段 [1]   [3,5]                    3,4        …

编写一段程序来寻找第 n 个超级丑数.超级丑数是指其所有质因数都在长度为k的质数列表primes中的正整数.例如,[1, 2, 4, 7, 8, 13, 14, 16, 19, 26, 28, 32],是给定长度为 4 的质数列表primes = [2, 7, 13, 19]的前 12 个超级丑数.注意:(1) 1是任何给定的primes的超级丑数.(2) 给定primes中的数字以升序排列.(3) 0 < k ≤ 100, 0 < n ≤ 106, 0 < primes[i] <…

题目如下: 解题思路:总结一下这么几点,一出一进,优先级队列排序,保证每次输出的都是当前的最小值.解法大致如图: 代码如下: #include<map> #include<queue> using namespace std; struct node { node(int k,int v) { key = k; val = v; } friend bool operator< (node n1, node n2) { return n1.val > n2.val; }…

A 2d grid map of m rows and n columns is initially filled with water. We may perform an addLand operation which turns the water at position (row, col) into a land. Given a list of positions to operate, count the number of islands after each addLand o…

Single Number Given an array of integers, every element appears twice except for one. Find that single one. c++版: class Solution { public: int singleNumber(int arr[] , int length) { int result=arr[0]; for(int i = 1 ; i < length ; ++i) result = result…

A 2d grid map of m rows and n columns is initially filled with water. We may perform an addLand operation which turns the water at position (row, col) into a land. Given a list of positions to operate, count the number of islands after each addLand o…

LeetCode169. Majority Element Given an array of size n, find the majority element. The majority element is the element that appears more than ⌊ n/2 ⌋ times. (Easy) You may assume that the array is non-empty and the majority element always exist in th…

136. Single Number Given an array of integers, every element appears twice except for one. Find that single one. (Easy) Note:Your algorithm should have a linear runtime complexity. Could you implement it without using extra memory? 分析: 第一问属于技巧题,做过就会,…

Problem Description: A 2d grid map of m rows and n columns is initially filled with water. We may perform an addLand operation which turns the water at position (row, col) into a land. Given a list of positions to operate, count the number of islands…

A 2d grid map of m rows and n columns is initially filled with water. We may perform an addLand operation which turns the water at position (row, col) into a land. Given a list of positions to operate, count the number of islands after each addLand o…

题目: A 2d grid map of m rows and n columns is initially filled with water. We may perform an addLand operation which turns the water at position (row, col) into a land. Given a list of positions to operate, count the number of islands after each addLa…

A 2d grid map of m rows and n columns is initially filled with water. We may perform an addLand operation which turns the water at position (row, col) into a land. Given a list of positions to operate, count the number of islands after each addLand o…

A 2d grid map of m rows and n columns is initially filled with water. We may perform an addLand operation which turns the water at position (row, col) into a land. Given a list of positions to operate, count the number of islands after each addLand o…