c++ map学习

class Solution {
public:
    void FindNumsAppearOnce(vector<int> data,int* num1,int *num2) {
        vector<int> res;
        map<int, int> m;
        for(auto x:data) m[x]++;
        for(auto x:m){
            if(x.second == 1) res.push_back(x.first);
        }
        *num1=res[0], *num2=res[1];
        
    }
};

 

遍历时，key可以用m.first调用，value可以用m.second调用