证件号码 签到时间 签离时间

其中时间按“小时:分钟:秒钟”（各占2位）给出，证件号码是长度不超过15的字符串。

#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;

struct time
{
    int h, m, s;

bool operator < (time &o)
    {
        if (h == o.h)
        {
            if (m == o.m)
            {
                return s < o.s;
            }
            else return m < o.m;
        }
        else return h < o.h;
    }
};

struct person
{
    char id[20];
    time in, out;
};

bool cmpi(person &a, person &b) { return a.in < b.in; }
bool cmpo(person &a, person &b) { return a.out < b.out; }

vector<person> dayp;

int main()
{
    int n, m;
    person tmp;

while (scanf("%d", &n) != EOF)
    {
        while (n--)
        {
            dayp.resize(0);
            scanf("%d", &m);
            while (m--)
            {
                scanf("%s %d:%d:%d %d:%d:%d",
                       &tmp.id,
                       &tmp.in.h, &tmp.in.m, &tmp.in.s,
                       &tmp.out.h, &tmp.out.m, &tmp.out.s);
                dayp.push_back(tmp);
            }
            sort(dayp.begin(), dayp.begin() + dayp.size(), cmpi);
            printf("%s ", dayp[0].id);
            sort(dayp.begin(), dayp.begin() + dayp.size(), cmpo);
            printf("%s\n", dayp[dayp.size() - 1].id);
        }
    }

return 0;
}

搞掂…………