Fast train

#include <cstdio>
#include <iostream>
#include <string>

using namespace std;

string name, s, timer1, timer2, bestname;
int h1, h2, m1, m2, all_time, result = int(1e9), n, cnt;

int main()
{
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);

    cin >> n;

    for (int i = 0; i < n; i++)
    {
        cnt = 0;
        name = "";

        for (;;)
        {
            cin >> s;
            name += s;

            for (int j = 0; j < s.size(); j++)
                if (s[j] == '"')
                    cnt++;

            if (cnt == 2) break;
            name += " ";
        }

        cin >> timer1 >> timer2;

        sscanf(timer1.c_str(), "%d:%d ", &h1, &m1);
        sscanf(timer2.c_str(), "%d:%d ", &h2, &m2);

        all_time = (h2 * 60 + m2) - (h1 * 60 + m1);
        if (all_time <= 0) all_time += 24 * 60;

        if (all_time < result)
        {
            result = all_time;
            bestname = name;
        }
    }

    cout << "The fastest train is " << bestname <<".\nIt's speed is " << int(650.0 / result * 60 + 0.5) << " km/h, approximately.";

    return 0;
}