【PAT Advanced Level】1006. Sign In and Sign Out (25)

#include <stdio.h>
#include <string.h>
#include <fstream>
#include <iostream>
using namespace std;

int main()
{

int num;
while (scanf("%d", &num) != EOF)
{

char earlest[20];
char lastest[20];
char thisone[20];
int h1, h2, m1, m2, s1, s2;
scanf("%s%d%*c%d%*c%d %d%*c%d%*c%d", &thisone, &h1, &m1, &s1, &h2, &m2, &s2);
int ear = 3600 * h1 + 60 * m1 + s1;
int lat = 3600 * h2 + 60 * m2 + s2;
memcpy(earlest, thisone, sizeof(thisone)/sizeof(char));
memcpy(lastest, thisone, sizeof(thisone)/sizeof(char));
num--;
while (num--)
{
memset(thisone, 0, sizeof(thisone)/sizeof(char));
scanf("%s%d%*c%d%*c%d %d%*c%d%*c%d", &thisone, &h1, &m1, &s1, &h2, &m2, &s2);
int tmp1 = 3600 * h1 + 60 * m1 + s1;
int tmp2 = 3600 * h2 + 60 * m2 + s2;
if(ear > tmp1)
{
//earlest[0] = '\0';
memset(earlest, 0, sizeof(earlest)/sizeof(char));
memcpy(earlest, thisone, sizeof(thisone)/sizeof(char));
ear = tmp1;
}
if(lat < tmp2)
{
//lastest[0] = '\0';	//清空字符数组，也可以用下面一种方法，更为保险
memset(lastest, 0, sizeof(lastest)/sizeof(char));
memcpy(lastest, thisone, sizeof(thisone)/sizeof(char));
lat = tmp2;
}
}

printf("%s %s\n", earlest, lastest);
}
}