1006. Sign In and Sign Out

#include <stdio.h>
#include <algorithm>
#include <iostream>
#include <string.h>
using namespace std;
 
struct stu
{
    char ID[16];
    int GetTime[3];
    int LeaveTime[3];
};
 
stu Student[101];
 
 
 
int main()
{
    int n,i,j;
       int m;
    while(scanf("%d",&m)!=EOF)
    {
        
         
            
            for(j=0;j<m;j++)
            {
                scanf("%s %d:%d:%d %d:%d:%d",Student[j].ID,&Student[j].GetTime[0],&Student[j].GetTime[1],&Student[j].GetTime[2],&Student[j].LeaveTime[0],&Student[j].LeaveTime[1],&Student[j].LeaveTime[2]);
            }
 
            int GetHour,GetMin,GetSec,LeaveHour,LeaveMin,LeaveSec;
 
            GetHour=GetMin=GetSec=50;
            LeaveHour=LeaveHour=LeaveSec=-1;
 
            int OpenMan,CloseMan;
 
            for(j=0;j<m;j++)
            {
                if(Student[j].GetTime[0]<GetHour)
                {
                    GetHour=Student[j].GetTime[0];
                    OpenMan=j;
                }
                else if(Student[j].GetTime[0]==GetHour)
                {
                    if(Student[j].GetTime[1]<GetMin)
                    {
                        GetMin=Student[j].GetTime[1];
                        OpenMan=j;
                    }
                    else if(Student[j].GetTime[1]==GetMin)
                    {
                        if(Student[j].GetTime[2]<GetSec)
                        {
                            GetSec=Student[j].GetTime[2];
                            OpenMan=j;
                        }
                    }
                }
 
 
                if(Student[j].LeaveTime[0]>LeaveHour)
                {
                    LeaveHour=Student[j].LeaveTime[0];
                    CloseMan=j;
                }
                else if(Student[j].LeaveTime[0]==LeaveHour)
                {
                    if(Student[j].LeaveTime[1]>LeaveMin)
                    {
                        LeaveMin=Student[j].LeaveTime[1];
                        CloseMan=j;
                    }
                    else if(Student[j].LeaveTime[1]==LeaveMin)
                    {
                        if(Student[j].LeaveTime[2]>LeaveSec)
                        {
                            LeaveSec=Student[j].LeaveTime[2];
                            CloseMan=j;
                        }
                    }
                }
            }
 
 
            printf("%s %s
",Student[OpenMan].ID,Student[CloseMan].ID);
        
    }
    return 0;
}