#include <iostream>

using namespace std;

unsigned difference_in_minutes(unsigned, unsigned);

int main()
{
    unsigned start, end;

    // cout << "Please input your start time in military time(example: 8:3=2030): ";
    cin >> start;

    // cout << "Please input your end time: ";
    cin >> end;

    cout << "Your elapsed time is " << difference_in_minutes(start, end) << " minutes.";

    return 0;
}

unsigned minutes_since_midnight(unsigned military_time)
{
    const unsigned hours = military_time / 100;
    const unsigned minutes = military_time % 100;

    return hours * 60 + minutes;
}

unsigned difference_in_minutes(unsigned begin_time, unsigned end_time)
{
    const unsigned beg = minutes_since_midnight(begin_time);
    const unsigned end = minutes_since_midnight(end_time);

    return end - beg;
}