AssociateProfitSplitter.sol

pragma solidity ^0.5.0;

/* /Level One: EQUAL SPLIT/
Profit distributed equally among employees
*/
contract AssociateProfitSplitter {

    address payable employee_one;
    address payable employee_two;
    address payable employee_three;

    constructor(address payable _one, address payable _two, address payable _three) public {
        employee_one = _one;
        employee_two = _two;
        employee_three = _three;
    }

    function balance() public view returns(uint) {
        return address(this).balance;
    }

    function deposit() public payable {
        // @TODO: Split `msg.value` into three
        uint amount = msg.value/3; 

        // @TODO: Transfer the amount to each employee
        employee_one.transfer(amount);
        employee_two.transfer(amount);
        employee_three.transfer(amount);


        // @TODO: take care of a potential remainder by sending back to HR (`msg.sender`)
        msg.sender.transfer(msg.value - 3*amount);
    }

    function() external payable {
        // @TODO: Enforce that the `deposit` function is called in the fallback function!
        deposit();
    }
}