click to show spoilers. Some hints: Could negative integers be palindromes? (ie, -1) If you are thinking of converting the integer to string, note the restriction of using extra space. You could also try reversing an integer. However, if you have solved the problem "Reverse Integer", you...
leetcode problem 9: Palindrome Number classSolution {public:boolisPalindrome(intx) {intret =0;while(x >ret){intremainder = x %10;if(remainder ==0&& ret ==0){returnfalse; } ret*=10; ret+=remainder;if(x ==ret){returntrue; } x/=10; }if(x ==ret){returntrue; }returnfalse; } ...
As can be seen from the above process, the problem of brute force cracking is that the time complexity ofis too high, and the reason is high becausehas some skipped processesin the traversal process. In order to facilitate understanding, we bring in a problem Example 1 in the case oftarget...
class Solution { public: string frequencySort(string s) { unordered_map<char, int> mp; // 创建哈希表 int length = s.length(); for (auto &ch : s) { mp[ch]++; // 枚举每一个字符的出现频率 } vector<pair<char, int>> vec; for (auto &it : mp) { vec.emplace_back(it); // ...
DailyProblem Maximum Depth of Binary Tree Jul 28, 2020 Interview Search Insert Position Jul 17, 2020 InterviewPrepare Pascal's Triangle Jan 14, 2022 List 解决LeetCode.33题,注意数组里有一个值和有两个值的特殊情况; May 8, 2017 PowerOfX 解决LeetCode342题; Oct 25, 2016 ...
动态数组ans等于temperatures的长度，length表示temperatures的大小，两个for循环解决，当快指针遇到更大的...
class Solution { public: int sumDistance(vector<int>& nums, string s, int d) { vect...
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LeetCode Problem 9:Palindrome Number回文数 描述:Determine whether an integer is a palindrome. Do this without extra space. Some hints: Could negative integers be palindromes? (ie, -1) If you are thinking of converting the integer to string, note the restriction of using extra space....