hdu 1209 Clock(水题）

#include <iostream>
#include <cstdio>
#include <algorithm>
struct Time
{
    int hour;
    int minute;
    int angle;
};
double compute_angle(Time a)
{
    if (a.hour >= 12)
        a.hour -= 12;
    int t = abs(a.hour*60 + a.minute - a.minute*12); 　　　　　　　　//乘以2避免浮点数运算
    if (t > 360)
    t = 720 - t;
    return t;
}
bool cmp(Time t1, Time t2)
{
    if (t1.angle != t2.angle)
        return t1.angle < t2.angle;
    else if (t1.hour != t2.hour)
         return t1.hour < t2.hour;
    else
        return t1.minute < t2.minute;
}
int main()
{
    int n;
    scanf("%d", &n);
    while (n--)
    {
        Time t[5];
        for (int i = 0; i < 5; ++i)
        {
            scanf("%d:%d", &t[i].hour, &t[i].minute);
            t[i].angle = compute_angle(t[i]);
        }
        std::sort(t, t + 5, cmp);
        printf("%02d:%02d\n", t[2].hour, t[2].minute);
    }
    system("pause");
    return 0;
}