contract BasicToken is ERC20Basic {
  using SafeMath for uint256;

  mapping(address => uint256) balances;

  // @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 returns (bool) {
    require(_to != address(0));

    // SafeMath.sub will throw if there is not enough balance.
    balances[msg.sender] = balances[msg.sender].sub(_value);
    balances[_to] = balances[_to].add(_value);
    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.
  // @return An uint256 representing the amount owned by the passed address.
  
  function balanceOf(address _owner) public constant returns (uint256 balance) {
    return balances[_owner];
  }

}
// @title Basic token  * @dev Basic version of StandardToken, with no allowances.
function balanceOf(address _owner) public constant returns (uint256 balance) {
    return balances[_owner];
  }
// @dev Gets the balance of the specified address.  * @param _owner The address to query the the balance of.
// @return An uint256 representing the amount owned by the passed address.