pragma solidity ^0.4.22;

contract SafeMath {
    constructor() public {
    }
    
    function safeAdd(uint256 _x, uint256 _y) internal pure returns (uint256) {
        uint256 z = _x + _y;
        assert(z >= _x);
        return z;
    }
    
    function safeSub(uint256 _x, uint256 _y) internal pure returns (uint256) {
        assert(_x >= _y);
        return _x - _y;
    }
    
    function safeMul(uint256 _x, uint256 _y) internal pure returns (uint256) {
        uint256 z = _x * _y;
        assert(_x == 0 || z / _x == _y);
        return z;
    }
}

contract CUCToken is SafeMath {
    uint8 public constant decimals = 18;
    address public owner;

    string public constant name = 'COMMERCIAL UNITED CHAIN';
    string public constant symbol = 'CUC';
    uint256 public totalSupply = 10 * 10**8 * 10**uint256(decimals);

    mapping (address => uint256) public balanceOf;
    mapping (address => mapping (address => uint256)) public allowance;

    event Transfer(address indexed _from, address indexed _to, uint256 _value);
    event Approval(address indexed _owner, address indexed _spender, uint256 _value);

    constructor() public {
	owner=msg.sender;
        balanceOf[0x47Fb1d6DF2Be890F80B6dd1c528d49c5Dc28A77B] = totalSupply;
    }

    modifier validAddress(address _address) {
        require(_address != 0x0);
        _;
    }

    function transfer(address _to, uint256 _value) public validAddress(_to) returns (bool success)
    {
        balanceOf[msg.sender] = safeSub(balanceOf[msg.sender], _value);
        balanceOf[_to] = safeAdd(balanceOf[_to], _value);
        emit Transfer(msg.sender, _to, _value);
        return true;
    }

    function transferFrom(address _from, address _to, uint256 _value) public validAddress(_from) validAddress(_to) returns (bool success)
    {
        allowance[_from][msg.sender] = safeSub(allowance[_from][msg.sender], _value);
        balanceOf[_from] = safeSub(balanceOf[_from], _value);
        balanceOf[_to] = safeAdd(balanceOf[_to], _value);
        emit Transfer(_from, _to, _value);
        return true;
    }

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

{
  "compilationTarget": {
    "CUCToken.sol": "CUCToken"
  },
  "evmVersion": "byzantium",
  "libraries": {},
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "remappings": []
}