Write a program for the distribution of duty

Programmer services are required. You need to write a program for the distribution of duty among employees. The program can be designed in any environment...C++, Excel, etc. The main thing is that it evenly, taking into account the load of employees, distributes among them for a month of duty. The load depending on the day of the week (weekends, holidays) and the type of duty can be assigned a coefficient ... so that by the end of the month the coeff of all employees were approximately equal. It should be possible to print the final version on a sheet, A4 format (album version). Weekends should be distinguished by a different color, the ability to change the month, year and duty if you need a slight adjustment manually.