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 Subtracts 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 IERC20Token - ERC20 interface
 * @dev see https://github.com/ethereum/EIPs/issues/20
 */
contract IERC20Token {
    string public name;
    string public symbol;
    uint8 public decimals;
    uint256 public totalSupply;

    function balanceOf(address _owner) public constant returns (uint256 balance);
    function transfer(address _to, uint256 _value)  public returns (bool success);
    function transferFrom(address _from, address _to, uint256 _value)  public returns (bool success);
    function approve(address _spender, uint256 _value)  public returns (bool success);
    function allowance(address _owner, address _spender)  public constant returns (uint256 remaining);

    event Transfer(address indexed _from, address indexed _to, uint256 _value);
    event Approval(address indexed _owner, address indexed _spender, uint256 _value);
}

/**
 * @title ERC20Token - ERC20 base implementation
 * @dev see https://github.com/ethereum/EIPs/issues/20
 */
contract ERC20Token is IERC20Token {

    using SafeMath for uint256;

    
    mapping (address => uint256) public balances;
    mapping (address => mapping (address => uint256)) public allowed;

    function transfer(address _to, uint256 _value) public returns (bool) {
        require(_to != address(0));
        require(balances[msg.sender] >= _value);

        balances[msg.sender] = balances[msg.sender].sub(_value);
        balances[_to] = balances[_to].add(_value);
        Transfer(msg.sender, _to, _value);
        return true;
    }

    function transferFrom(address _from, address _to, uint256 _value) public returns (bool) {
        require(_to != address(0));
        require(balances[_from] >= _value && allowed[_from][msg.sender] >= _value);

        balances[_to] = balances[_to].add(_value);
        balances[_from] = balances[_from].sub(_value);
        allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
        Transfer(_from, _to, _value);
        return true;
    }

    function balanceOf(address _owner) public constant returns (uint256) {
        return balances[_owner];
    }

    function approve(address _spender, uint256 _value) public returns (bool) {
        allowed[msg.sender][_spender] = _value;
        Approval(msg.sender, _spender, _value);
        return true;
    }

    function allowance(address _owner, address _spender) public constant returns (uint256) {
      return allowed[_owner][_spender];
    }
}


contract OPSToken is ERC20Token {

    uint256 public constant JointICOBonusAmount = 84000000;
    address public constant JointICOContractAddress = 0x29eC21157f19F7822432e87ef504D366c24E1D8B;
    address public constant OPSPoolAddress = 0xEA5C0F39e5E3c742fF6e387394e0337e7366a121;

    uint256 public  decimalPlace;

    
    function OPSToken() public {
        name = "OPS";
        symbol = "OPS";
        decimals = 18;

        decimalPlace = 10**uint256(decimals);
        totalSupply = 1000000000*decimalPlace;
        distributeTokens();
    }

    function distributeTokens () private {
        balances[OPSPoolAddress] = totalSupply.sub(JointICOBonusAmount.mul(decimalPlace));
        balances[JointICOContractAddress] = JointICOBonusAmount.mul(decimalPlace);
    }

}