pragma solidity ^0.4.21;

contract Solution {

    bytes32 answer = 0xdb81b4d58595fbbbb592d3661a34cdca14d7ab379441400cbfa1b78bc447c365;

    function test () public view returns (uint8) {
        for (uint8 i=0; i<256; i++) {
            if (keccak256(i) == answer )
                { return i; }
        }
    }

    function callContract() payable {
        GuessTheSecretNumberChallenge ab = GuessTheSecretNumberChallenge(0x5616D8B8762A8bAA0b744853f96856a3C0323584);
        ab.guess.value(1 ether)(test());
    }

    function() payable {
    }

    function destroy() {
        selfdestruct(msg.sender);
    }
}

contract GuessTheSecretNumberChallenge {
    bytes32 answerHash = 0xdb81b4d58595fbbbb592d3661a34cdca14d7ab379441400cbfa1b78bc447c365;

    function GuessTheSecretNumberChallenge() public payable {
        require(msg.value == 1 ether);
    }

    function isComplete() public view returns (bool) {
        return address(this).balance == 0;
    }

    function guess(uint8 n) public payable {
        require(msg.value == 1 ether);

        if (keccak256(n) == answerHash) {
            msg.sender.transfer(2 ether);
        }
    }
}