GuessNumber.sol

    pragma solidity ^0.4.18;
    
    contract GuessNumber{
              struct Player {
                address addr;
                uint number;
              }
              Player[2] private players;
              
              uint num;
              address owner;
    
              function GuessNumber () public{
                owner = msg.sender;
              }
    
              function play(uint number) public payable{
                if (msg.value != 1 ether) 
                    revert();
                players[num] = Player(msg.sender, number);
                num++;
                if (num==2) Winner();
              }
    
              function Winner() private {
                uint n = players[0].number+players[1].number;
                if (n%2==0) 
                  players[0].addr.transfer(1.8 ether);
                else
                  players[1].addr.transfer(1.8 ether);
                delete players;
                num=0;
              }
    
              function getProfit() public{
                if(msg.sender!=owner) 
                    revert();
                msg.sender.transfer(this.balance);
             }
    }