九度：1013<开门人>

第一时间作为字符串处理

#include <stdio.h>
#include <iostream>
#include <cstring>

using namespace std;

struct People{
char name[20];
char ct[20];//come time
char lt[20];//leave time
};

int main(){

#ifdef ONLINE_JUDGE
#else
freopen("E:\\in.txt", "r", stdin);
#endif

int days;
while(scanf("%d", &days) != EOF){
while(days-->0){
People fcome, lleave;
People t;
int np;//num of people
int i;

scanf("%d", &np);
for(i=0; i<np; i++){
scanf("%s %s %s", t.name, t.ct, t.lt);

if(i==0){
strcpy(fcome.name, t.name);
strcpy(fcome.ct, t.ct);

strcpy(lleave.name, t.name);
strcpy(lleave.lt, t.lt);
continue;
}

if(strcmp(t.ct, fcome.ct) < 0){
strcpy(fcome.name, t.name);
strcpy(fcome.ct, t.ct);
}// more ahead

if(strcmp(t.lt, lleave.lt) > 0){
strcpy(lleave.name, t.name);
strcpy(lleave.lt, t.lt);
}// more late

}// for: compare

cout << fcome.name << ' ' << lleave.name << endl;
}
}//while

return 0;
}

第二设立专门的时间格式

#include <stdio.h>
#include <iostream>
#include <cstring>

using namespace std;

struct Time{
int hour;
int minute;
int sec;
};

struct People{
char name[20];
struct Time ct;//come time
struct Time lt;//leave time

};

int cmp(Time x, Time y){
if(x.hour < y.hour)
return -1;
else if(x.hour > y.hour)
return 1;
else if(x.minute < y.minute)
return -1;
else if(x.minute > y.minute)
return 1;
else if(x.sec < y.sec)
return -1;
else
return 1;

}

int main(){

#ifdef ONLINE_JUDGE
#else
freopen("E:\\in.txt", "r", stdin);
#endif

int days;
while(scanf("%d", &days) != EOF){
while(days-->0){
People fcome, lleave;
People t;
int np;
scanf("%d", &np);
int i;
for(i=0; i<np; i++){
scanf("%s %d:%d:%d %d:%d:%d", t.name, &t.ct.hour, &t.ct.minute, &t.ct.sec,
&t.lt.hour, &t.lt.minute, &t.lt.sec);

if(i==0){
strcpy(fcome.name, t.name);
fcome.ct.hour=t.ct.hour;
fcome.ct.minute=t.ct.minute;
fcome.ct.sec=t.ct.sec;

strcpy(lleave.name, t.name);
lleave.lt.hour=t.lt.hour;
lleave.lt.minute=t.lt.minute;
lleave.lt.sec=t.lt.sec;
continue;
}

if(cmp(t.ct, fcome.ct) < 0){
strcpy(fcome.name, t.name);
fcome.ct.hour=t.ct.hour;
fcome.ct.minute=t.ct.minute;
fcome.ct.sec=t.ct.sec;
}// more ahead

if(cmp(t.lt, lleave.lt) > 0){
strcpy(lleave.name, t.name);
lleave.lt.hour=t.lt.hour;
lleave.lt.minute=t.lt.minute;
lleave.lt.sec=t.lt.sec;
}// more late

}// for: compare

cout << fcome.name << ' ' << lleave.name << endl;
}
}//while

return 0;
}