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/**
 *Submitted for verification at Etherscan.io on 2018-05-23
*/

pragma solidity ^0.4.18;


/**
 * @title SafeMath
 * @dev Math operations with safety checks that throw on error
 */
library SafeMath {

  /**
  * @dev Multiplies two numbers, throws on overflow.
  */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        if (a == 0) {
            return 0;
        }
        uint256 c = a * b;
        assert(c / a == b);
        return c;
    }

    /**
    * @dev Integer division of two numbers, truncating the quotient.
    */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        // assert(b > 0); // Solidity automatically throws when dividing by 0
        uint256 c = a / b;
        // assert(a == b * c + a % b); // There is no case in which this doesn't hold
        return c;
    }

    /**
    * @dev Substracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
    */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        assert(b <= a);
        return a - b;
    }

    /**
    * @dev Adds two numbers, throws on overflow.
    */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        assert(c >= a);
        return c;
    }
}


/**
 * @title Ownable
 * @dev The Ownable contract has an owner address, and provides basic authorization control
 * functions, this simplifies the implementation of "user permissions".
 */
contract Ownable {
    address public owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
    * @dev The Ownable constructor sets the original `owner` of the contract to the sender
    * account.
    */
    function Ownable() public {
        owner = msg.sender;
    }

    /**
    * @dev Throws if called by any account other than the owner.
    */
    modifier onlyOwner() {
        require(msg.sender == owner);
        _;
    }

    /**
    * @dev Allows the current owner to transfer control of the contract to a newOwner.
    * @param newOwner The address to transfer ownership to.
    */
    function transferOwnership(address newOwner) public onlyOwner {
        require(newOwner != address(0));
        OwnershipTransferred(owner, newOwner);
        owner = newOwner;
    }

}


/**
 * @title ERC20Basic
 * @dev Simpler version of ERC20 interface
 * @dev see https://github.com/ethereum/EIPs/issues/179
 */
contract ERC20BasicInterface {
    function totalSupply() public view returns (uint256);
    function balanceOf(address who) public view returns (uint256);
    function transfer(address to, uint256 value) public returns (bool);
    event Transfer(address indexed from, address indexed to, uint256 value);

    uint8 public decimals;
}


/**
 * @title AirDropContract
 * Simply do the airdrop.
 */
contract AirDrop is Ownable {
    using SafeMath for uint256;

    // the amount that owner wants to send each time
    uint public airDropAmount;

    // the mapping to judge whether each address has already received airDropped
    mapping ( address => bool ) public invalidAirDrop;

    // the array of addresses which received airDrop
    address[] public arrayAirDropReceivers;

    // flag to stop airdrop
    bool public stop = false;

    ERC20BasicInterface public erc20;

    uint256 public startTime;
    uint256 public endTime;

    // event
    event LogAirDrop(address indexed receiver, uint amount);
    event LogStop();
    event LogStart();
    event LogWithdrawal(address indexed receiver, uint amount);

    /**
    * @dev Constructor to set _airDropAmount and _tokenAddresss.
    * @param _airDropAmount The amount of token that is sent for doing airDrop.
    * @param _tokenAddress The address of token.
    */
    constructor(uint256 _startTime, uint256 _endTime, uint _airDropAmount, address _tokenAddress) public {
        require(_startTime >= now &&
            _endTime >= _startTime &&
            _airDropAmount > 0 &&
            _tokenAddress != address(0)
        );
        startTime = _startTime;
        endTime = _endTime;
        erc20 = ERC20BasicInterface(_tokenAddress);
        uint tokenDecimals = erc20.decimals();
        airDropAmount = _airDropAmount.mul(10 ** tokenDecimals);
    }

    /**
    * @dev Confirm that airDrop is available.
    * @return A bool to confirm that airDrop is available.
    */
    function isValidAirDropForAll() public view returns (bool) {
        bool validNotStop = !stop;
        bool validAmount = getRemainingToken() >= airDropAmount;
        bool validPeriod = now >= startTime && now <= endTime;
        return validNotStop && validAmount && validPeriod;
    }

    /**
    * @dev Confirm that airDrop is available for msg.sender.
    * @return A bool to confirm that airDrop is available for msg.sender.
    */
    function isValidAirDropForIndividual() public view returns (bool) {
        bool validNotStop = !stop;
        bool validAmount = getRemainingToken() >= airDropAmount;
        bool validPeriod = now >= startTime && now <= endTime;
        bool validReceiveAirDropForIndividual = !invalidAirDrop[msg.sender];
        return validNotStop && validAmount && validPeriod && validReceiveAirDropForIndividual;
    }

    /**
    * @dev Do the airDrop to msg.sender
    */
    function receiveAirDrop() public {
        require(isValidAirDropForIndividual());

        // set invalidAirDrop of msg.sender to true
        invalidAirDrop[msg.sender] = true;

        // set msg.sender to the array of the airDropReceiver
        arrayAirDropReceivers.push(msg.sender);

        // execute transferFrom
        require(erc20.transfer(msg.sender, airDropAmount));

        emit LogAirDrop(msg.sender, airDropAmount);
    }

    /**
    * @dev Change the state of stop flag
    */
    function toggle() public onlyOwner {
        stop = !stop;

        if (stop) {
            emit LogStop();
        } else {
            emit LogStart();
        }
    }

    /**
    * @dev Withdraw the amount of token that is remaining in this contract.
    * @param _address The address of EOA that can receive token from this contract.
    */
    function withdraw(address _address) public onlyOwner {
        require(stop || now > endTime);
        require(_address != address(0));
        uint tokenBalanceOfContract = getRemainingToken();
        require(erc20.transfer(_address, tokenBalanceOfContract));
        emit LogWithdrawal(_address, tokenBalanceOfContract);
    }

    /**
    * @dev Get the total number of addresses which received airDrop.
    * @return Uint256 the total number of addresses which received airDrop.
    */
    function getTotalNumberOfAddressesReceivedAirDrop() public view returns (uint256) {
        return arrayAirDropReceivers.length;
    }

    /**
    * @dev Get the remaining amount of token user can receive.
    * @return Uint256 the amount of token that user can reveive.
    */
    function getRemainingToken() public view returns (uint256) {
        return erc20.balanceOf(this);
    }

    /**
    * @dev Return the total amount of token user received.
    * @return Uint256 total amount of token user received.
    */
    function getTotalAirDroppedAmount() public view returns (uint256) {
        return airDropAmount.mul(arrayAirDropReceivers.length);
    }
}

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000000000000000000000000000000000000000000000000000000005b052d90000000000000000000000000000000000000000000000000000000006dd525100000000000000000000000000000000000000000000000000000000000000003000000000000000000000000318117e8fb2e9f6be234ee4dab49fbed97175c7b

-----Decoded View---------------
Arg [0] : _startTime (uint256): 1527066000
Arg [1] : _endTime (uint256): 1842685200
Arg [2] : _airDropAmount (uint256): 3
Arg [3] : _tokenAddress (address): 0x318117E8fb2E9f6bE234Ee4dab49fbEd97175C7b

-----Encoded View---------------
4 Constructor Arguments found :
Arg [0] : 000000000000000000000000000000000000000000000000000000005b052d90
Arg [1] : 000000000000000000000000000000000000000000000000000000006dd52510
Arg [2] : 0000000000000000000000000000000000000000000000000000000000000003
Arg [3] : 000000000000000000000000318117e8fb2e9f6be234ee4dab49fbed97175c7b

bzzr://d476158c682a32126d1a0134f69030bc74a2d1e5703431083f3b0710b9a0f388