#include <iostream>
#include <iomanip>
#include <ctime>

int main()
{
    std::tm eleje, vege;

    std::cout << "eleje : ";
    std::cin >> std::get_time(&eleje, "%T");

    std::cout << "vege : ";
    std::cin >> std::get_time(&vege, "%T");

    std::cout << "közte : " << ((vege.tm_hour * 60 * 60 + vege.tm_min * 60 + vege.tm_sec) - (eleje.tm_hour * 60 * 60 + eleje.tm_min * 60 + eleje.tm_sec)) << std::endl;
}