contract BurnableToken is StandardToken {



    event Burn(address indexed burner, uint256 value);



    /**

     * @dev Burns a specific amount of tokens.

     * @param _value The amount of token to be burned.

     */

    function burn(uint256 _value) public {

        require(_value > 0);

        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



        address burner = msg.sender;

        balances[burner] = balances[burner].sub(_value);

        totalSupply = totalSupply.sub(_value);

        Burn(burner, _value);

    }

}
/**
 
 * @title Burnable Token
 
 * @dev Token that can be irreversibly burned (destroyed).
 
 */
function burn(uint256 _value) public {

    require(_value > 0);

    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



    address burner = msg.sender;

    balances[burner] = balances[burner].sub(_value);

    totalSupply = totalSupply.sub(_value);

    Burn(burner, _value);

}

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