#include <iostream>

int main()
{
    int transmission_speed; //speed of the transmission in bytes per seconds
    int file_size_mb; //file's size in MBs

    std::cout << "Enter the speed of the transmission in bytes per seconds: ";
    std::cin >> transmission_speed;
    std::cout << "Enter the file's size in megabytes: ";
    std::cin >> file_size_mb;

    int file_size_b = file_size_mb *1024*1024;

    int seconds_needed = file_size_b / transmission_speed;

    int days_needed = (seconds_needed / 3600) / 24;
    seconds_needed -= days_needed*86400;

    int hours_needed = seconds_needed / 3600;
    seconds_needed -= hours_needed*3600;

    std::cout << "Days needed: " << days_needed << std::endl;
    std::cout << "Hours needed: " << hours_needed << std::endl;
    std::cout << "Seconds needed: " << seconds_needed << std::endl;
    return(0);
}

int days_needed = (seconds_needed / 3600) / 24;
seconds_needed -= days_needed*86400;

std::cin >> transmission_speed;
std::cin >> file_size_mb;

cat input.txt | ./program

int seconds_needed = file_size_b / transmission_speed;

if ( file_size_b % transmission_speed != 0 )
   ++seconds_needed;