contract BurnableToken is StandardToken, Ownable  {

  event Burn(address indexed burner, uint256 value);

  /**
   * @dev Burns a specific amount of tokens from owner.
   * @param _value The amount of token to be burned.
   */
  function burn(uint256 _value) onlyOwner public {
    require(_value <= balances[msg.sender]);
    // no need to require value <= totalSupply, since that would imply the
    // sender's balance is greater than the totalSupply, which *should* be an assertion failure

    balances[msg.sender] = balances[msg.sender].sub(_value);
    totalSupply = totalSupply.sub(_value);
    Burn(msg.sender, _value);
    Transfer(msg.sender, address(0), _value);
  }
}
function burn(uint256 _value) onlyOwner public {
  require(_value <= balances[msg.sender]);
  // no need to require value <= totalSupply, since that would imply the
  // sender's balance is greater than the totalSupply, which *should* be an assertion failure

  balances[msg.sender] = balances[msg.sender].sub(_value);
  totalSupply = totalSupply.sub(_value);
  Burn(msg.sender, _value);
  Transfer(msg.sender, address(0), _value);
}

/**
 * @dev Burns a specific amount of tokens from owner.
 * @param _value The amount of token to be burned.
 */