// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.8.0;

library UnsafeMath {
    /// @dev Division by 0 has unspecified behavior, and must be checked externally.
    function ceilDiv(uint256 x, uint256 y) internal pure returns (uint256 z) {
        assembly {
            z := add(div(x, y), gt(mod(x, y), 0))
        }
    }
}