pragma solidity ^0.4.19;

contract Faucet{
    //fixed128x20 public a;
    // payable address add public = msg.sender;
    function withdraw(uint withdraw_aumout) public{
        require(withdraw_aumout <= 1000000000);
        msg.sender.transfer(withdraw_aumout);
    }
    
    function () public payable{}
}