contract BasicToken is ERC20Basic {
    using SafeMath for uint256;
  
    mapping(address => uint256) balances;
  
    uint256 totalSupply_;
  
    /**
    * @dev total number of tokens in existence
    */
    function totalSupply() public view returns (uint256) {
      return totalSupply_;
    }
  
    /**
    * @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));
      require(_value <= balances[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);
      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 view returns (uint256 balance) {
      return balances[_owner];
    }
  
  }
/**
 * @title Basic token
 * @dev Basic version of StandardToken, with no allowances.
 */
function totalSupply() public view returns (uint256) {
      return totalSupply_;
    }
/**
 * @dev total number of tokens in existence
 */