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library SafeMath    - function mul(uint256 a, uint256 b)    - function div(uint256 a, uint256 b)    - function sub(uint256 a, uint256 b)    - function add(uint256 a, uint256 b)  contract Ownable    - function Ownable()  contract TokenERC20 is Ownable *    - function TokenERC20()    - function _transfer(address _from, add ...    - function transfer(address _to, uint25 ...    - function burn(uint256 _value)    - function _burn(address _who, uint256 ...

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/**
 *Submitted for verification at Etherscan.io on 2018-04-25
*/

pragma solidity ^0.4.21;
/*
* @author Ivan Borisov(Github.com/pillardevelopment)
*/
library SafeMath {

    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;
    }

    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        assert(b > 0);
        uint256 c = a / b;
        assert(a == b * 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 Ownable {
    address public owner;

    function Ownable() public {
        owner = msg.sender;
    }

    modifier onlyOwner() {
        require(msg.sender == owner);
        _;
    }
}

contract TokenERC20 is Ownable {
    using SafeMath for uint;

    string public name = "Your Open Direct Sales Ecosystem";
    string public symbol = "YODSE";
    uint256 public decimals = 18;
    uint256 DEC = 10 ** uint256(decimals);
    address public owner;
    uint256 public totalSupply = 100000000*DEC;
    uint256 public avaliableSupply;

    mapping (address => uint256) public balanceOf;

    event Transfer(address indexed from, address indexed to, uint256 value);
    event Burn(address indexed from, uint256 value);

    function TokenERC20() public
    {
        balanceOf[msg.sender] = totalSupply;
        avaliableSupply = balanceOf[msg.sender];
        owner = msg.sender;
    }

    function _transfer(address _from, address _to, uint256 _value) internal {
        require(_to != 0x0);
        require(balanceOf[_from] >= _value);
        require(balanceOf[_to] + _value > balanceOf[_to]);
        uint previousBalances = balanceOf[_from] + balanceOf[_to];
        balanceOf[_from] -= _value;
        balanceOf[_to] += _value;
        emit Transfer(_from, _to, _value);
        assert(balanceOf[_from] + balanceOf[_to] == previousBalances);
    }

    function transfer(address _to, uint256 _value) public {
        _transfer(msg.sender, _to, _value);
    }

    function burn(uint256 _value) public {
        _burn(msg.sender, _value);
    }

    function _burn(address _who, uint256 _value) internal {
        require(_value <= balanceOf[_who]);
        balanceOf[_who] = balanceOf[_who].sub(_value);
        totalSupply = totalSupply.sub(_value);
        emit Burn(_who, _value);
        emit Transfer(_who, address(0), _value);
    }
}

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