// Contract: Asatpad
// Target function: function mulDiv(uint256 x, uint256 y, uint256 denominator) internal pure returns (uint256 result)
    }



    /**

     * @dev Returns the name of the token.

     */

    function name() public view virtual override returns (string memory) {

        return _name;

    }



    /**

     * @dev Returns the symbol of the token, usually a shorter version of the

     * name.

     */

    function symbol() public view virtual override returns (string memory) {

        return _symbol;

    }



    /**

     * @dev Returns the number of decimals used to get its user representation.

     * For example, if `decimals` equals `2`, a balance of `505` tokens should

     * be displayed to a user as `5.05` (`505 / 10 ** 2`).

     *

     * Tokens usually opt for a value of 18, imitating the relationship between

     * Ether and Wei. This is the default value returned by this function, unless

     * it's overridden.

     *

     * NOTE: This information is only used for _display_ purposes: it in

     * no way affects any of the arithmetic of the contract, including

     * {IERC20-balanceOf} and {IERC20-transfer}.

     */

    function decimals() public view virtual override returns (uint8) {

        return 18;

    }



    /**

     * @dev See {IERC20-totalSupply}.

     */

    function totalSupply() public view virtual override returns (uint256) {

        return _totalSupply;

    }



    /**

     * @dev See {IERC20-balanceOf}.

     */

    function balanceOf(address account) public view virtual override returns (uint256) {

        return _balances[account];

    }



    /**

     * @dev See {IERC20-transfer}.

     *

     * Requirements:

     *

     * - `to` cannot be the zero address.

     * - the caller must have a balance of at least `amount`.

     */

    function transfer(address to, uint256 amount) public virtual override returns (bool) {

        address owner = _msgSender();

        _transfer(owner, to, amount);

        return true;

    }



    /**

     * @dev See {IERC20-allowance}.

     */

    function allowance(address owner, address spender) public view virtual override returns (uint256) {

        return _allowances[owner][spender];

    }



    /**

     * @dev See {IERC20-approve}.

     *

     * NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on

     * `transferFrom`. This is semantically equivalent to an infinite approval.

     *

     * Requirements:

     *

     * - `spender` cannot be the zero address.

     */

    function approve(address spender, uint256 amount) public virtual override returns (bool) {

        address owner = _msgSender();

        _approve(owner, spender, amount);

        return true;

    }



    /**

     * @dev See {IERC20-transferFrom}.

     *

     * Emits an {Approval} event indicating the updated allowance. This is not

     * required by the EIP. See the note at the beginning of {ERC20}.

     *

     * NOTE: Does not update the allowance if the current allowance

     * is the maximum `uint256`.

     *

     * Requirements:

     *

     * - `from` and `to` cannot be the zero address.

     * - `from` must have a balance of at least `amount`.

     * - the caller must have allowance for ``from``'s tokens of at least

     * `amount`.

     */

    function transferFrom(address from, address to, uint256 amount) public virtual override returns (bool) {

        address spender = _msgSender();

        _spendAllowance(from, spender, amount);

        _transfer(from, to, amount);

        return true;

    }



    /**

     * @dev Atomically increases the allowance granted to `spender` by the caller.

     *

     * This is an alternative to {approve} that can be used as a mitigation for

     * problems described in {IERC20-approve}.

     *

     * Emits an {Approval} event indicating the updated allowance.

     *

     * Requirements:

     *

     * - `spender` cannot be the zero address.

     */

    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {

        address owner = _msgSender();

        _approve(owner, spender, allowance(owner, spender) + addedValue);

        return true;

    }



    /**

     * @dev Atomically decreases the allowance granted to `spender` by the caller.

     *

     * This is an alternative to {approve} that can be used as a mitigation for

     * problems described in {IERC20-approve}.

     *

     * Emits an {Approval} event indicating the updated allowance.

     *

     * Requirements:

     *

     * - `spender` cannot be the zero address.

     * - `spender` must have allowance for the caller of at least

     * `subtractedValue`.

     */

    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {

        address owner = _msgSender();

        uint256 currentAllowance = allowance(owner, spender);

        require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");

        unchecked {

            _approve(owner, spender, currentAllowance - subtractedValue);

        }



        return true;

    }



    /**

     * @dev Moves `amount` of tokens from `from` to `to`.

     *

     * This internal function is equivalent to {transfer}, and can be used to

     * e.g. implement automatic token fees, slashing mechanisms, etc.

     *

     * Emits a {Transfer} event.

     *

     * Requirements:

     *

     * - `from` cannot be the zero address.

     * - `to` cannot be the zero address.

     * - `from` must have a balance of at least `amount`.

     */

    function _transfer(address from, address to, uint256 amount) internal virtual {

        require(from != address(0), "ERC20: transfer from the zero address");

        require(to != address(0), "ERC20: transfer to the zero address");



        _beforeTokenTransfer(from, to, amount);



        uint256 fromBalance = _balances[from];

        require(fromBalance >= amount, "ERC20: transfer amount exceeds balance");

        unchecked {

            _balances[from] = fromBalance - amount;

            // Overflow not possible: the sum of all balances is capped by totalSupply, and the sum is preserved by

            // decrementing then incrementing.

            _balances[to] += amount;

        }



        emit Transfer(from, to, amount);



        _afterTokenTransfer(from, to, amount);

    }



    /** @dev Creates `amount` tokens and assigns them to `account`, increasing

     * the total supply.

     *

     * Emits a {Transfer} event with `from` set to the zero address.

     *

     * Requirements:

     *

     * - `account` cannot be the zero address.

     */

    function _mint(address account, uint256 amount) internal virtual {

        require(account != address(0), "ERC20: mint to the zero address");



        _beforeTokenTransfer(address(0), account, amount);



        _totalSupply += amount;

        unchecked {

            // Overflow not possible: balance + amount is at most totalSupply + amount, which is checked above.

            _balances[account] += amount;

        }

        emit Transfer(address(0), account, amount);



        _afterTokenTransfer(address(0), account, amount);

    }



    /**

     * @dev Destroys `amount` tokens from `account`, reducing the

     * total supply.

     *

     * Emits a {Transfer} event with `to` set to the zero address.

     *

     * Requirements:

     *

     * - `account` cannot be the zero address.

     * - `account` must have at least `amount` tokens.

     */

    function _burn(address account, uint256 amount) internal virtual {

        require(account != address(0), "ERC20: burn from the zero address");



        _beforeTokenTransfer(account, address(0), amount);



        uint256 accountBalance = _balances[account];

        require(accountBalance >= amount, "ERC20: burn amount exceeds balance");

        unchecked {

            _balances[account] = accountBalance - amount;

            // Overflow not possible: amount <= accountBalance <= totalSupply.

            _totalSupply -= amount;

        }



        emit Transfer(account, address(0), amount);



        _afterTokenTransfer(account, address(0), amount);

    }



    /**

     * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.

     *

     * This internal function is equivalent to `approve`, and can be used to

     * e.g. set automatic allowances for certain subsystems, etc.

     *

     * Emits an {Approval} event.

     *

     * Requirements:

     *

     * - `owner` cannot be the zero address.

     * - `spender` cannot be the zero address.

     */

    function _approve(address owner, address spender, uint256 amount) internal virtual {

        require(owner != address(0), "ERC20: approve from the zero address");

        require(spender != address(0), "ERC20: approve to the zero address");



        _allowances[owner][spender] = amount;

        emit Approval(owner, spender, amount);

    }



    /**

     * @dev Updates `owner` s allowance for `spender` based on spent `amount`.

     *

     * Does not update the allowance amount in case of infinite allowance.

     * Revert if not enough allowance is available.

     *

     * Might emit an {Approval} event.

     */

    function _spendAllowance(address owner, address spender, uint256 amount) internal virtual {

        uint256 currentAllowance = allowance(owner, spender);

        if (currentAllowance != type(uint256).max) {

            require(currentAllowance >= amount, "ERC20: insufficient allowance");

            unchecked {

                _approve(owner, spender, currentAllowance - amount);

            }

        }

    }



    /**

     * @dev Hook that is called before any transfer of tokens. This includes

     * minting and burning.

     *

     * Calling conditions:

     *

     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens

     * will be transferred to `to`.

     * - when `from` is zero, `amount` tokens will be minted for `to`.

     * - when `to` is zero, `amount` of ``from``'s tokens will be burned.

     * - `from` and `to` are never both zero.

     *

     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].

     */

    function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual {}



    /**

     * @dev Hook that is called after any transfer of tokens. This includes

     * minting and burning.

     *

     * Calling conditions:

     *

     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens

     * has been transferred to `to`.

     * - when `from` is zero, `amount` tokens have been minted for `to`.

     * - when `to` is zero, `amount` of ``from``'s tokens have been burned.

     * - `from` and `to` are never both zero.

     *

     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].

     */

    function _afterTokenTransfer(address from, address to, uint256 amount) internal virtual {}

}





abstract contract ERC20Burnable is Context, ERC20 {

    /**

     * @dev Destroys `amount` tokens from the caller.

     *

     * See {ERC20-_burn}.

     */

    function burn(uint256 amount) public virtual {

        _burn(_msgSender(), amount);

    }



    /**

     * @dev Destroys `amount` tokens from `account`, deducting from the caller's

     * allowance.

     *

     * See {ERC20-_burn} and {ERC20-allowance}.

     *

     * Requirements:

     *

     * - the caller must have allowance for ``accounts``'s tokens of at least

     * `amount`.

     */

    function burnFrom(address account, uint256 amount) public virtual {

        _spendAllowance(account, _msgSender(), amount);

        _burn(account, amount);

    }

}



abstract contract Ownable is Context {

    address private _owner;



    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);



    /**

     * @dev Initializes the contract setting the deployer as the initial owner.

     */

    constructor() {

        _transferOwnership(_msgSender());

    }



    /**

     * @dev Throws if called by any account other than the owner.

     */

    modifier onlyOwner() {

        _checkOwner();

        _;

    }



    /**

     * @dev Returns the address of the current owner.

     */

    function owner() public view virtual returns (address) {

        return _owner;

    }



    /**

     * @dev Throws if the sender is not the owner.

     */

    function _checkOwner() internal view virtual {

        require(owner() == _msgSender(), "Ownable: caller is not the owner");

    }



    /**

     * @dev Leaves the contract without owner. It will not be possible to call

     * `onlyOwner` functions. Can only be called by the current owner.

     *

     * NOTE: Renouncing ownership will leave the contract without an owner,

     * thereby disabling any functionality that is only available to the owner.

     */

    function renounceOwnership() public virtual onlyOwner {

        _transferOwnership(address(0));

    }



    /**

     * @dev Transfers ownership of the contract to a new account (`newOwner`).

     * Can only be called by the current owner.

     */

    function transferOwnership(address newOwner) public virtual onlyOwner {

        require(newOwner != address(0), "Ownable: new owner is the zero address");

        _transferOwnership(newOwner);

    }



    /**

     * @dev Transfers ownership of the contract to a new account (`newOwner`).

     * Internal function without access restriction.

     */

    function _transferOwnership(address newOwner) internal virtual {

        address oldOwner = _owner;

        _owner = newOwner;

        emit OwnershipTransferred(oldOwner, newOwner);

    }

}





interface IERC20Permit {

    /**

     * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,

     * given ``owner``'s signed approval.

     *

     * IMPORTANT: The same issues {IERC20-approve} has related to transaction

     * ordering also apply here.

     *

     * Emits an {Approval} event.

     *

     * Requirements:

     *

     * - `spender` cannot be the zero address.

     * - `deadline` must be a timestamp in the future.

     * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`

     * over the EIP712-formatted function arguments.

     * - the signature must use ``owner``'s current nonce (see {nonces}).

     *

     * For more information on the signature format, see the

     * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP

     * section].

     */

    function permit(

        address owner,

        address spender,

        uint256 value,

        uint256 deadline,

        uint8 v,

        bytes32 r,

        bytes32 s

    ) external;



    /**

     * @dev Returns the current nonce for `owner`. This value must be

     * included whenever a signature is generated for {permit}.

     *

     * Every successful call to {permit} increases ``owner``'s nonce by one. This

     * prevents a signature from being used multiple times.

     */

    function nonces(address owner) external view returns (uint256);



    /**

     * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.

     */

    // solhint-disable-next-line func-name-mixedcase

    function DOMAIN_SEPARATOR() external view returns (bytes32);

}



library Math {

    enum Rounding {

        Down, // Toward negative infinity

        Up, // Toward infinity

        Zero // Toward zero

    }



    /**

     * @dev Returns the largest of two numbers.

     */

    function max(uint256 a, uint256 b) internal pure returns (uint256) {

        return a > b ? a : b;

    }



    /**

     * @dev Returns the smallest of two numbers.

     */

    function min(uint256 a, uint256 b) internal pure returns (uint256) {

        return a < b ? a : b;

    }



    /**

     * @dev Returns the average of two numbers. The result is rounded towards

     * zero.

     */

    function average(uint256 a, uint256 b) internal pure returns (uint256) {

        // (a + b) / 2 can overflow.

        return (a & b) + (a ^ b) / 2;

    }



    /**

     * @dev Returns the ceiling of the division of two numbers.

     *

     * This differs from standard division with `/` in that it rounds up instead

     * of rounding down.

     */

    function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {

        // (a + b - 1) / b can overflow on addition, so we distribute.

        return a == 0 ? 0 : (a - 1) / b + 1;

    }