pragma solidity ^0.4.0;

contract buytickets{
    address buyer;
    uint public   tickets;
    uint constant price = 1 ether;

    mapping (address => uint) public ticketsbought;

    function buytickets() public {
        tickets = 100;
        buyer = msg.sender;
    }

    function BuyTickets(uint amount) public payable{
        if(amount>tickets || msg.value != (amount*price)){
            throw;
        }
        ticketsbought[msg.sender] += amount;
        tickets -= amount;

        if(tickets == 0){
        selfdestruct(buyer);
        }
    }

    function () public payable{
        BuyTickets(1);
    }

}