pragma solidity ^0.5.0;

import "@openzeppelin/contracts/math/SafeMath.sol";

contract ExtendedMath {
    using SafeMath for uint256;

    // divide a/b then optionally floor or ceiling
    function divAndRound(uint256 a, uint256 b, bool ceiling) internal pure returns (uint256) {
        uint256 floor = a.div(b);
        return (ceiling && a.mod(b) != 0) ? floor.add(1) : floor;
    }
}