pragma solidity ^ 0.5.16;

contract ERC20Interface {
    function totalSupply() public view returns(uint);

    function balanceOf(address tokenOwner) public view returns(uint balance);

    function allowance(address tokenOwner, address spender) public view returns(uint remaining);

    function transfer(address to, uint tokens) public returns(bool success);

    function approve(address spender, uint tokens) public returns(bool success);

    function transferFrom(address from, address to, uint tokens) public returns(bool success);

    event Transfer(address indexed from, address indexed to, uint tokens);
    event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}

contract SafeMath {
    function safeAdd(uint a, uint b) public pure returns(uint c) {
        c = a + b;
        require(c >= a);
    }

    function safeSub(uint a, uint b) public pure returns(uint c) {
        require(b <= a);
        c = a - b;
    }

    function safeMul(uint a, uint b) public pure returns(uint c) {
        c = a * b;
        require(a == 0 || c / a == b);
    }

    function safeDiv(uint a, uint b) public pure returns(uint c) {
        require(b > 0);
        c = a / b;
    }
}


contract SlashToken is ERC20Interface, SafeMath {
    string public name;
    string public symbol;
    uint8 public decimals;

    uint256 public _totalSupply;

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


    constructor() public {
        name = "Ten Best Coins";
        symbol = "TBC";
        decimals = 18;
        _totalSupply = 25000000000000000000000000;

        balances[msg.sender] = _totalSupply;
        emit Transfer(address(0), msg.sender, _totalSupply);
    }

    function totalSupply() public view returns(uint) {
        return _totalSupply - balances[address(0)];
    }

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

    function allowance(address tokenOwner, address spender) public view returns(uint remaining) {
        return allowed[tokenOwner][spender];
    }

    function approve(address spender, uint tokens) public returns(bool success) {
        allowed[msg.sender][spender] = tokens;
        emit Approval(msg.sender, spender, tokens);
        return true;
    }

    function transfer(address to, uint tokens) public returns(bool success) {
        balances[msg.sender] = safeSub(balances[msg.sender], tokens);
        balances[to] = safeAdd(balances[to], tokens);
        emit Transfer(msg.sender, to, tokens);
        return true;
    }

    function transferFrom(address from, address to, uint tokens) public returns(bool success) {
        balances[from] = safeSub(balances[from], tokens);
        allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
        balances[to] = safeAdd(balances[to], tokens);
        emit Transfer(from, to, tokens);
        return true;
    }
}

{
  "compilationTarget": {
    "SlashToken.sol": "SlashToken"
  },
  "evmVersion": "istanbul",
  "libraries": {},
  "optimizer": {
    "enabled": false,
    "runs": 200
  },
  "remappings": []
}