题干: 代码:
class Solution {
public:vector<vector<int>> res;vector<int> tmp;void backtracking(int n, int k, int start){if(tmp.size() k){res.push_back(tmp);return;}for(int i start; i < n; i){tmp.push_back(i);bac…
Ruby on Rails(通常简称为 Rails)无疑是Web开发领域中最受欢迎的Ruby框架之一。它深受开发者喜爱,原因在于其遵循的“约定优于配置”(Convention over Configuration, CoC)和“不重复自己”(Dont Repeat Yo…