作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 暴力搜索 日期 题目地址:https://leetcode.com/problems/powerful-integers/ 题目描述 Given two non-negative integers x and y, an integer is powerful if it is equal to x^i + y^j for some integers…

题目标签:HashMap 题目让我们找出所有独一的powerful integers 小于bound的情况下. 把 x^i 看作 a:把 y^j 看作b, 代入for loop,把所有的情况都遍历一遍. 参考的这种方法,用for loop 写的比较简洁易懂. 具体看code. Java Solution: Runtime: 4 ms, faster than 99.85% Memory Usage: 37.5 MB, less than 7.69% 完成日期:03/13/2019 关键点:把 x…

Divide Two Integers Divide two integers without using multiplication, division and mod operator. SOLUTION 11. 基本思想是不断地减掉除数,直到为0为止.但是这样会太慢. 2. 我们可以使用2分法来加速这个过程.不断对除数*2,直到它比被除数还大为止.加倍的同时,也记录下cnt,将被除数减掉加倍后的值,并且结果+cnt. 因为是2倍地加大,所以速度会很快,指数级的速度. 3. 另外要注意的是…

Brute Force(暴力) class Solution(object): def powerfulIntegers(self, x, y, bound): """ :type x: int :type y: int :type bound: int :rtype: List[int] """ ans=[] for i in range(20): for j in range(20): a=x**i+y**j if a<=bound:…

[LeetCode]120. Triangle 解题报告(Python) 作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 题目地址https://leetcode.com/problems/triangle/description/ 题目描述: Given a triangle, find the minimum path sum from top to bottom. Each step you may move to adjac…

LeetCode 1 Two Sum 解题报告 偶然间听见leetcode这个平台,这里面题量也不是很多200多题,打算平时有空在研究生期间就刷完,跟跟多的练习算法的人进行交流思想,一定的ACM算法积累可以对以后在对算法中优化带来好处.Ok,今天是我做的第一题Add Two Sum. 题目要求 Given an array of integers, find two numbers such that they add up to a specific target number. The fu…

[LeetCode]Largest Number 解题报告 标签(空格分隔): LeetCode 题目地址:https://leetcode.com/problems/largest-number/#/description 题目描述: Given a list of non negative integers, arrange them such that they form the largest number. For example, given [3, 30, 34, 5, 9], t…

[题目] Given a collection of numbers that might contain duplicates, return all possible unique permutations. For example, [1,1,2] have the following unique permutations: [1,1,2], [1,2,1], and [2,1,1]. [解析] 题意:求一个数组的全排列.与[LeetCode]Permutations 解题报告 不同的是…

problem 970. Powerful Integers solution: class Solution { public: vector<int> powerfulIntegers(int x, int y, int bound) { unordered_set<int> tmp; ; a<bound; a*=x)// { ; a+b<=bound; b*=y) { tmp.insert(a+b);// ) break;// } ) break; } retur…

[LeetCode]Island Perimeter 解题报告 [LeetCode] https://leetcode.com/problems/island-perimeter/ Total Accepted: 16143 Total Submissions: 28552 Difficulty: Easy Question You are given a map in form of a two-dimensional integer grid where 1 represents land…