contract StandardToken is  ERC20Basic, Ownable {



uint256 public totalSupply;
  using SafeMath for uint256;

  mapping(address => uint256) balances;
  // allowedAddresses will be able to transfer even when locked
  // lockedAddresses will *not* be able to transfer even when *not locked*
  mapping(address => bool) public allowedAddresses;
  mapping(address => bool) public lockedAddresses;
  bool public locked = true;

  function allowAddress(address _addr, bool _allowed) public onlyOwner {
    require(_addr != owner);
    allowedAddresses[_addr] = _allowed;
  }

  function lockAddress(address _addr, bool _locked) public onlyOwner {
    require(_addr != owner);
    lockedAddresses[_addr] = _locked;
  }

  function setLocked(bool _locked) public onlyOwner {
    locked = _locked;
  }

  function canTransfer(address _addr) public view returns (bool can1) {
    if(locked){
      if(!allowedAddresses[_addr]&&_addr!=owner) return false;
    }else if(lockedAddresses[_addr]) return false;

    return true;
  }




  /**
  * @dev transfer token for a specified address
  * @param _to The address to transfer to.
  * @param _value The amount to be transferred.
  */
  function transfer(address _to, uint256 _value) public override returns (bool trans1) {
    require(_to != address(0));
    require(canTransfer(msg.sender));
    

    // SafeMath.sub will throw if there is not enough balance.
    balances[msg.sender] = balances[msg.sender].sub(_value);
    balances[_to] = balances[_to].add(_value);
    emit Transfer(msg.sender, _to, _value);
    return true;
  }

  /**
  * @dev Gets the balance of the specified address.
  * @param _owner The address to query the the balance of.
  
  */
  function balanceOf(address _owner) public view override returns (uint256 balance) {
    return balances[_owner];
  }


  mapping (address => mapping (address => uint256)) allowed;


  /**
   * @dev Transfer tokens from one address to another
   * @param _from address The address which you want to send tokens from
   * @param _to address The address which you want to transfer to
   * @param _value uint256 the amount of tokens to be transferred
   */
  function transferFrom(address _from, address _to, uint256 _value) public override returns (bool trans) {
    require(_to != address(0));
    require(canTransfer(msg.sender));

    uint256 _allowance = allowed[_from][msg.sender];

    // Check is not needed because sub(_allowance, _value) will already throw if this condition is not met
    // require (_value <= _allowance);

    balances[_from] = balances[_from].sub(_value);
    balances[_to] = balances[_to].add(_value);
    allowed[_from][msg.sender] = _allowance.sub(_value);
    emit Transfer(_from, _to, _value);
    return true;
  }

  /**
   * @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
   *
   * Beware that changing an allowance with this method brings the risk that someone may use both the old
   * and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
   * race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
   * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
   * @param _spender The address which will spend the funds.
   * @param _value The amount of tokens to be spent.
   */
  function approve(address _spender, uint256 _value) public override returns (bool hello) {
    allowed[msg.sender][_spender] = _value;
    emit Approval(msg.sender, _spender, _value);
    return true;
  }

  /**
   * @dev Function to check the amount of tokens that an owner allowed to a spender.
   * @param _owner address The address which owns the funds.
   * @param _spender address The address which will spend the funds.
   
   */
  function allowance(address _owner, address _spender) public view override  returns (uint256 remaining) {
    return allowed[_owner][_spender];
  }

  /**
   * approve should be called when allowed[_spender] == 0. To increment
   * allowed value is better to use this function to avoid 2 calls (and wait until
   * the first transaction is mined)
   * From MonolithDAO Token.sol
   */
  function increaseApproval (address _spender, uint _addedValue) public returns (bool success) {
    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 success) {
    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;
  }
}
/**
 * @title Standard ERC20 token
 *
 * @dev Implementation of the basic standard token.
 * @dev https://github.com/ethereum/EIPs/issues/20
 * @dev Based on code by FirstBlood: https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol
 */
function balanceOf(address _owner) public view override returns (uint256 balance) {
    return balances[_owner];
  }
/**
 * @dev Gets the balance of the specified address.
 * @param _owner The address to query the the balance of.
 
 */