代码(Python3) class Solution: def isHappy(self, n: int) -> bool: # used 维护已出现的数字集合 used: Set[int] = set() #当 n 未出现过时,继续计算下一个数 while n not in used: # 标记 n 已出现过 used.add(n) # 计算下一个数,即求 n 的每一位的平方和 nxt: int = 0 #当 n ...
LeetCode 202 -- python 计算 happy number 第一篇贡献给python计算happy number~ defcal(n): s=str(n) sum=0foriinrange(len(s)): sum+=int(s[i])**2returnsum a=77#13 139 ok; 4 5 6 not#print (cal(a))defitr(a): log_set=set([a])whilea!=1: temp=cal(a)iftempinlog_set:ret...
1 <= n <= 231 - 1 来源:力扣(LeetCode) 链接:https://leetcode-cn.com/problems/happy-number 方法: 方法一:哈希表法-可以收敛到1,肯定是有限迭代,否则一定进入循环 方法二:快慢指针-类似环形链表快慢指针相遇问题 python # 0202.快乐数 classSolution: defisHappy(self,n:int)->bool: """ 哈希法 ...
这是leetcode的问题:编写一个算法来确定一个数字是否“幸福”。Example: 19 is a happy number 82 + 22 = 6812 + 02 + 02 = 1 问题1:根据我的理解,如果发生1,则返回True,否则它将无限运行我从这句话中理解的循环,“或者它在不包括1的循环中无休止地循环。”89在集合中再次重复,因此输出False。很抱歉...
mid_result = {n} while True: n = cal_happy(n) if n==1: return True if n in mid_result: return False else: mid_result.add(n) 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 运行结果:...
《Hello 算法》:动画图解、一键运行的数据结构与算法教程。支持 Python, Java, C++, C, C#, JS, Go, Swift, Rust, Ruby, Kotlin, TS, Dart 代码。简体版和繁体版同步更新,English version ongoing - hello-algo/mkdocs.yml at main · do-happy/hello-algo
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Happy Number 快乐数(Easy)(JAVA) 题目地址: https://leetcode.com/problems/happy-number/ 题目描述: Write an algorithm to determine if a number n is “happy”. A happy number is a number def...lintcode-easy-Number of Islands Given a boolean 2D matrix, find the number of islands. Given...
【LeetCode】 Longest Common Prefix 【Python || C++】 题目: 最长的前缀公共子字符串 Write a function to find the longest common prefix string amongst an array of strings. If there is no common prefix, return an empty string "". Example 1: Example 2: &nb......
Runtime:36 ms, faster than55.09% of Python3 online submissions for Happy Number. Memory Usage:13.8 MB, less than72.99% of Python3 online submissions for Happy Number. 【解法三】 思路:在数字1-9中,2-6都不是快乐数,并且非快乐数都会陷入一个循环。