GG的博客

List是C#中常见的可伸缩数组组件，因为是可伸缩的，常常被用来代替数组，不需要手动分配数组大小。

问题：代码：​class Solution {public: int lengthOfLongestSubstring(string s) { unordered_set<char> occ; int n = s.size(); int rk = -1, ans = 0; for (int i = 0; i < n; i++ ){ if (i != 0 ){ occ.erase(s.

问题：代码：class Solution {public: ListNode* addTwoNumbers(ListNode* l1, ListNode* l2) { ListNode *head = nullptr, *tail = nullptr; int carry = 0; while (l1 || l2) { int n1 = l1 ? l1->val: 0; int n2

class Solution {public: vector<int> twoSum(vector<int>& nums, int target) { int n = nums.size(); for (int i = 0; i < n; ++i) { for (int j = i + 1; j < n; ++j) { if (nums[i] + nums[j] =.