#include <unordered_map> #include <vector> class Solution { public: /** * 代码中的类名、方法名、参数名已经指定,请勿修改,直接返回方法规定的值即可 * * * @param array int整型vector * @return int整型vector */ vector<int> FindNumsAppearOnce(vector<int>& array) { // write code here unordered_map<int, int> m; for(int i = 0;i<array.size();++i) { m[array[i]]++; } vector<int> res; for(auto beg = m.begin();beg != m.end();++beg) { if(beg->second == 1) res.push_back(beg->first); if(res.size() == 2) { if(res[0] > res[1]) swap(res[0],res[1]); break; } } return res; } };
思路:哈希表