5516. 警告一小时内使用相同员工卡大于等于三次的人

class Solution {
public:
    vector<string> alertNames(vector<string>& keyName, vector<string>& keyTime) {
        map<string, set<string> > mp;
        int n = keyName.size();
        for(int i  = 0;i < n;i++) mp[keyName[i]].insert(keyTime[i]);
        vector<string> ans;
        for(auto p : mp){
            string name = p.first;
            if(check(p.second)) ans.push_back(name);
        }
        return ans;
    }
private:
    bool check(set<string> p){
        if(p.size()<=2) return false;
        vector<string> v(p.begin(),p.end());
        for(auto i = 0;i+2<v.size();i++){
            if(checkTime(v[i],v[i+2])) return true;
        }
        return false;
    }
    bool checkTime(string l,string r){
        int s = getTime(l);
        int e = getTime(r);
        if(e-s<=60) return true;
        return false;
    }
    int getTime(string s){
        int ans = 0;
        ans =atoi(s.substr(0,2).c_str())*60+atoi(s.substr(3,2).c_str());
        return ans;
    }
};