poj2501

简单题

#include <iostream>
#include <cstdio>
#include <cstdlib>
#include <cstring>
using namespace std;

int cal(int h, int m, int s)
{
    return h * 3600 + m * 60 + s;
}

int main()
{
    //freopen("t.txt", "r", stdin);
    int h, m, s;
    double speed = 0;
    double ans = 0;
    int last = 0;
    while (scanf("%d:%d:%d", &h, &m, &s) != EOF)
    {
        char ch = getchar();
        if (ch == ' ')
        {
            int a;
            scanf("%d", &a);
            int now = cal(h, m, s);
            ans += (now - last) * speed;
            last = now;
            speed = a / 3.6;
        }else
            printf("%02d:%02d:%02d %.2f km\n", h, m, s, (ans +  (cal(h, m, s) - last) * speed) / 1000);
    }
    return 0;
}