pragma solidity ^0.4.24;


library SafeMath {
    function mul(uint256 a, uint256 b) internal pure returns(uint256) {
        uint256 c = a * b;
        assert(a == 0 || c / a == b);
        return c;
    }

    function div(uint256 a, uint256 b) internal pure returns(uint256) {
        uint256 c = a / b;
        return c;
    }

    function sub(uint256 a, uint256 b) internal pure returns(uint256) {
        assert(b <= a);
        return a - b;
    }

    function add(uint256 a, uint256 b) internal pure returns(uint256) {
        uint256 c = a + b;
        assert(c >= a);
        return c;
    }
}


contract ERC20 {
    uint256 public totalSupply;

    function balanceOf(address who) public view returns(uint256);

    function transfer(address to, uint256 value) public returns(bool);

    function allowance(address owner, address spender) public view returns(uint256);

    function transferFrom(address from, address to, uint256 value) public returns(bool);

    function approve(address spender, uint256 value) public returns(bool);

    event Transfer(address indexed from, address indexed to, uint256 value);
    event Approval(address indexed owner, address indexed spender, uint256 value);
}


contract StandardToken is ERC20 {
    using SafeMath
    for uint256;

    mapping(address => uint256) balances;
    mapping(address => mapping(address => uint256)) allowed;


    
    function balanceOf(address _owner) public view returns(uint256 balance) {
        return balances[_owner];
    }

    
    function transfer(address _to, uint256 _value) public returns(bool) {
        require(_to != address(0));

        
        balances[msg.sender] = balances[msg.sender].sub(_value);
        balances[_to] = balances[_to].add(_value);
        emit Transfer(msg.sender, _to, _value);
        return true;
    }

    
    function transferFrom(address _from, address _to, uint256 _value) public returns(bool) {
        require(_value <= balances[_from]);
        require(_value <= allowed[_from][msg.sender]);
        require(_to != address(0));

        balances[_from] = balances[_from].sub(_value);
        balances[_to] = balances[_to].add(_value);
        allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
        emit Transfer(_from, _to, _value);
        return true;
    }

    
    function approve(address _spender, uint256 _value) public returns(bool) {
        require((_value == 0) || (allowed[msg.sender][_spender] == 0));
        allowed[msg.sender][_spender] = _value;
        emit Approval(msg.sender, _spender, _value);
        return true;
    }

    
    function allowance(address _owner, address _spender) public view returns(uint256 remaining) {
        return allowed[_owner][_spender];
    }
}

contract ICWToken is StandardToken {
    string public constant name = "Intelligent Car Washing Token";
    string public constant symbol = "ICWT";
    uint8 public constant decimals = 18;
    uint256 public constant INITIAL_SUPPLY = 20000000000 * (10 ** uint256(decimals));

    
    address public contributorsAddress = 0x42cd691a49e8FF418528Fe906553B002846dE3cf;
    
    address public companyAddress = 0xf9C722e5c7c3313BBcD80e9A78e055391f75C732;
    
    address public marketAddress = 0xbd2F5D1975ccE83dfbf2B5743B1F8409CF211f90;
    
    address public icoAddress = 0xe26E3a77cA40b3e04C64E29f6c076Eec25a66E76;

    
    uint8 public constant CONTRIBUTORS_SHARE = 30;
    
    uint8 public constant COMPANY_SHARE = 20;
    
    uint8 public constant MARKET_SHARE = 30;
    
    uint8 public constant ICO_SHARE = 20;
    
    constructor() public {
        totalSupply = INITIAL_SUPPLY;
        uint256 valueContributorsAddress = INITIAL_SUPPLY.mul(CONTRIBUTORS_SHARE).div(100);
        balances[contributorsAddress] = valueContributorsAddress;
        emit Transfer(address(0), contributorsAddress, valueContributorsAddress);

        uint256 valueCompanyAddress = INITIAL_SUPPLY.mul(COMPANY_SHARE).div(100);
        balances[companyAddress] = valueCompanyAddress;
        emit Transfer(address(0), companyAddress, valueCompanyAddress);

        uint256 valueMarketAddress = INITIAL_SUPPLY.mul(MARKET_SHARE).div(100);
        balances[marketAddress] = valueMarketAddress;
        emit Transfer(address(0), marketAddress, valueMarketAddress);

        uint256 valueIcoAddress = INITIAL_SUPPLY.mul(ICO_SHARE).div(100);
        balances[icoAddress] = valueIcoAddress;
        emit Transfer(address(0), icoAddress, valueIcoAddress);

    }
}