#include <iostream>
using namespace std;

int main() {

    // Declare all the variables we need for the application,
    // in groups so that the related variables are easy to find.
    int contestantNumber;
    int startHour, startMinute, startSecond, startTotalSeconds;
    int endHour, endMinute, endSecond, endTotalSeconds;
    int contestantResultSeconds, bestResultSeconds, bestResultContestantNumber;

    // Since we're going to increase this every loop, this has to be intitialized.
    // Working with an uninitialized variable will result in a program error.
    int totalContestants = 0;

    // When the first contestant result is entered, it will have
    // no best result to compare with, which will cause a program error.
    // Therefore, we set it to something really bad, which means that
    // practically any result will beat it.
    bestResultSeconds = 60*60*24*365*1000; // A thousand years. Not a very good.
    bestResultContestantNumber = -1;

    // Keep asking for new contestants forever,
    // until something in the loop breaks the loop
    // (which we have decided a contestantNumber of < 0 does)
    while(true) {
        // Let the user know that we are collecting
        // time data about a new contestant
        cout << "New Contestant!" << endl;

        // Collect a number for the contestant
        cout << "[Start number] (-1 to quit): ";
        cin >> contestantNumber;

        // If you enter a number less than
        // zero, we're done collecting results
        if(contestantNumber < 0) {
            break; // break means to end the while loop right here
        }

        // The user did not decide to end the application,
        // which means that we are adding a new contestant.
        // We begin by increasing the number of total contestants we have,
        // since we want to keep track of that for the end of the application.
        totalContestants++; // Increase by one

        // Collect start time
        cout << "[Start Time]" << endl;
        cout << "Hour: ";
        cin >> startHour;
        cout << "Minute: ";
        cin >> startMinute;
        cout << "Second: ";
        cin >> startSecond;

        // Collect end time
        cout << "[End Time]" << endl;
        cout << "Hour: ";
        cin >> endHour;
        cout << "Minute: ";
        cin >> endMinute;
        cout << "Second: ";
        cin >> endSecond;

        // Awesome design feature: Spacing after each contestant entry
        cout << endl;

        // We need to transform hours, minutes and seconds to a
        // single number which we can use to compare and count with.

        // Lets convert them all to seconds
        startTotalSeconds = startHour*60*60 + startMinute*60 + startSecond;
        endTotalSeconds = endHour*60*60 + endMinute*60 + endSecond;

        // Now we can use these single numbers to
        // calculate the time between start and end
        contestantResultSeconds = endTotalSeconds-startTotalSeconds;

        // Now that we have the contestants result, we can compare it
        // to our best result so far and see if the new contestant beats it
        // NOTE: a better result is a faster time, which is a lower amount of seconds
        if(contestantResultSeconds < bestResultSeconds) {
            // Yes, we have a new best result!
            // Lets overwrite the old one. Haha, sucker!
            bestResultSeconds = contestantResultSeconds;
            bestResultContestantNumber = contestantNumber;
        }
    }

    // Even more awesome design, more spacing!
    cout << endl;

    // When the application reaches this point it means the
    // while loop is done, so the user is satisfied with the
    // number of contestants we have and want to know who won.

    // If the user decides not to enter any contestants, we don't have a best
    // result (bad user!). But sadly, we programmers need to handle every scenario!
    if(bestResultContestantNumber == -1) {
        // Let the user know that we are very dissapointed
        cout << "Bad user, you didn't enter any contestants!" << endl;
    }

    // Or, we have a nice user and we have our winner.
    // Let the user know who the winner is!
    else {

        // Convert the best result from total seconds to hours, minutes and seconds.
        int hours = (bestResultSeconds/60/60) % 24;
        int minutes = (bestResultSeconds/60) % 60;
        int seconds = bestResultSeconds % 60;

        cout << "The winner is contestant #" << bestResultContestantNumber;
        cout << " with the time " << hours << ":" << minutes << ":" << seconds << endl;
        cout << "We thank all the " << totalContestants << " contestants, ";
        cout << "but there can be only one winner." << endl;
        cout << "See you next time!" << endl;
    }

    // This is the end of the program, so we tell the system to pause
    // so that she has time to read all the magnificent text we have output!
    system("pause");
    return 0;
}