代码 1classSolution {2public:3boolisHappy(intn) {4set<int>dict;5while(!dict.count(n)){6dict.insert(n);7intsum =0;8while(n >=1){9sum += (n %10) * (n %10);10n /=10;11}12n =sum;13if(sum ==1)14returntrue;15}16returnfalse;17}18};...
链接地址:https://leetcode.com/problems/happy-number/ 2 解决方案 java代码如下: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 public class Solution { public boolean isHappy(int n) { int result = 0; ArrayList<Integer...
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 不为 0 时,则...
isHappy(sum(int(i)**2 for i in str(n))) if n > 4 else n == 1 #一行尾递归 快慢指针解题: **Java: ** class Solution { public boolean isHappy(int n) { int slow = n, fast = helper(n); while (slow != fast) {//条件是快慢指针不相遇 slow = helper(slow); fast = ...
leetcode 幸运数字 202. Happy Number Write an algorithm to determine if a number is "happy". A happy number is a number defined by the following process: Starting with any positive integer, replace the number by the sum of the ...
Starting with any positive integer, replace the number by the sum of the squares of its digits. Repeat the process until the number equals 1 (where it will stay), or itloops endlessly in a cyclewhich does not include 1. Those numbers for which this processends in 1are happy. ...
LeetCode 202. Happy Number 欢迎访问原文所在博客:https://52heartz.top/articles/leetcode-202-happy-number/ 解答1[Java]: 思路 使用一个 Set,如果 Set 已经包含了当前元素,说明发生循环了。就返回 false。 解答2[Java]:神奇的解法 思路 这个是 1ms 的 sample submission。 最后使用了一个 1 和 7 来...
leetcode 202. Happy Number Write an algorithm to determine if a number is "happy". A happy number is a number defined by the following process: Starting with any positive integer, replace the number by the sum of the squares of its digits, and repeat the process until the number equals ...
[LeetCode]Happy Number Question Write an algorithm to determine if a number is “happy”. A happy number is a number defined by the following process: Starting with any positive integer, replace the number by the sum of the squares of its digits, and repeat the process until the number ...
19 is a happy number 1^2 + 9^2 = 82 8^2 + 2^2 = 68 6^2 + 8^2 = 100 1^2 + 0^2 + 0^2 = 1 LeetCode上的原题,请参见我之前的博客Happy Number。 解法一: classSolution {public:/** * @param n an integer * @return true if this is a happy number or false*/boolisHap...