PATA 1006. Sign In and Sign Out (25)

#include <bits/stdc++.h>
using namespace std;
const int N = 100005;
struct visitor{
	char ID[20];
	int in_h,in_m,in_s;
	int out_h,out_m,out_s;
}v[N]; 

int main(){
	int m,i;
	struct visitor late,early;//最晚，最早
	scanf("%d",&m);
	for( i = 0;i < m; i++)
	{
		scanf("%s %d:%d:%d %d:%d:%d",v[i].ID,&v[i].in_h,&v[i].in_m,&v[i].in_s,&v[i].out_h,&v[i].out_m,&v[i].out_s);
		
	}
	late = v[0];
	early = v[0];
	for(i = 1;i < m; i++)
	{
		if(v[i].in_h < early.in_h) {
			early = v[i];
		}
		else if(v[i].in_h == early.in_h) {
			if(v[i].in_m < early.in_m){
				early = v[i]; 
			}
			else if(v[i].in_m == early.in_m){
				if(v[i].in_s < early.in_s ){
					early = v[i];
				}
			}	
		}
		if(v[i].out_h > late.out_h)	{late = v[i];}
		else if(v[i].out_h == late.out_h){
			if(v[i].out_m > late.out_m){
				late = v[i]; 
			}
			else if(v[i].out_m == late.out_m){
				if(v[i].out_s > late.out_s)
				{
					late = v[i];
				}
			}
		}
	}
	printf("%s %s",early.ID,late.ID);
	return 0;
}