// Vulnerability label: FE1
pragma solidity ^0.4.23;contract Ownable {address public owner;event OwnershipRenounced(address indexed previousOwner);event OwnershipTransferred(address indexed previousOwner,address indexed newOwner);constructor() public {owner = msg.sender;}modifier onlyOwner() {require(msg.sender == owner);_;}function transferOwnership(address newOwner) public onlyOwner {require(newOwner != address(0));emit OwnershipTransferred(owner, newOwner);owner = newOwner;}function renounceOwnership() public onlyOwner {emit OwnershipRenounced(owner);owner = address(0);}}library SafeMath {function mul(uint256 a, uint256 b) internal pure returns (uint256 c) {if (a == 0) {return 0;}c = a * b;assert(c / a == b);return c;}function div(uint256 a, uint256 b) internal pure returns (uint256) {return a / b;}function sub(uint256 a, uint256 b) internal pure returns (uint256) {assert(b <= a);return a - b;}function add(uint256 a, uint256 b) internal pure returns (uint256 c) {c = a + b;assert(c >= a);return c;}}contract ERC20Basic {function totalSupply() public view returns (uint256);function balanceOf(address who) public view returns (uint256);function transfer(address to, uint256 value) public returns (bool);event Transfer(address indexed from, address indexed to, uint256 value);}contract ERC20 is ERC20Basic {function allowance(address owner, address spender) public view returns (uint256);function transferFrom(address from, address to, uint256 value) public returns(bool);function approve(address spender, uint256 value) public returns (bool);event Approval(address indexed owner, address indexed spender, uint256 value);}contract BasicToken is ERC20Basic {using SafeMath for uint256;mapping(address => uint256) balances;uint256 totalSupply_;function totalSupply() public view returns (uint256) {return totalSupply_;}function transfer(address _to, uint256 _value) public returns (bool) {require(_to != address(0));require(_value <= balances[msg.sender]);balances[msg.sender] = balances[msg.sender].sub(_value);balances[_to] = balances[_to].add(_value);emit Transfer(msg.sender, _to, _value);return true;}function balanceOf(address _owner) public view returns (uint256) {return balances[_owner];}}contract StandardToken is ERC20, BasicToken {mapping (address => mapping (address => uint256)) internal allowed;function transferFrom(address _from, address _to, uint256 _value) public returns(bool) {require(_to != address(0));require(_value <= balances[_from]);require(_value <= allowed[_from][msg.sender]);balances[_from] = balances[_from].sub(_value);balances[_to] = balances[_to].add(_value);allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);emit Transfer(_from, _to, _value);return true;}function approve(address _spender, uint256 _value) public returns (bool) {require((_value == 0 ) || (allowed[msg.sender][_spender] == 0));allowed[msg.sender][_spender] = _value;emit Approval(msg.sender, _spender, _value);return true;}function allowance(address _owner, address _spender) public view returns (uint256) {return allowed[_owner][_spender];}function increaseApproval(address _spender, uint _addedValue) public returns (bool){allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue);emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);return true;}function decreaseApproval(address _spender, uint _subtractedValue) public returns(bool) {uint oldValue = allowed[msg.sender][_spender];if (_subtractedValue > oldValue) {allowed[msg.sender][_spender] = 0;} else {allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue);}emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);return true;}}contract TokenContract is StandardToken{string public constant name="bbb";string public constant symbol="BBBB"; uint8 public constant decimals=18;uint256 public constant INITIAL_SUPPLY=10000000000000000000000;uint256 public constant MAX_SUPPLY = 100 * 10000 * 10000 * (10 **uint256(decimals));constructor() TokenContract() public {totalSupply_ = INITIAL_SUPPLY;balances[msg.sender] = INITIAL_SUPPLY;emit Transfer(0x0, msg.sender, INITIAL_SUPPLY);}function() payable public {revert();}}