题解 | #开门人和关门人#

#include<iostream>
#include<string>
#include<map>

using namespace std;


struct timeStamp{
	int hour;
	int minute;
	int second;

	bool friend operator<(timeStamp a,timeStamp b){
		if(a.hour==b.hour){
			if(a.minute==b.minute){
				return a.second<b.second;
			} else {
				return a.minute<b.minute;
			}
		} else {
			return a.hour<b.hour;
		}
	}
};
struct record{
	string id;
	timeStamp enter,leave;
};
int main(){
	
	int n;
	string id;
	map<timeStamp,string> enter;
	map<timeStamp,string> leave;
	timeStamp enterStamp;
	timeStamp leaveStamp;
    while(cin>>n){
        for(int i=0;i<n;i++){

            cin>>id;
            cin>>enterStamp.hour;
			cin.ignore(1);
			cin>>enterStamp.minute;
			cin.ignore(1);
			cin>>enterStamp.second;
			cin.ignore(1);
            cin>>leaveStamp.hour;
			cin.ignore(1);
			cin>>leaveStamp.minute;
			cin.ignore(1);
			cin>>leaveStamp.second;
			cin.ignore(1);
            enter[enterStamp] = id;
            leave[leaveStamp] = id;
        }
        map<timeStamp,string>::iterator first = enter.begin();
        map<timeStamp,string>::reverse_iterator last = leave.rbegin();
        cout<<first->second<<" "<<last->second<<endl;
	
	}
    return 0;
}