maymax777

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maymax777

pragma solidity ^0.4.19;

contract Roman {
    
    uint[] key = [1000, 900, 500, 400, 100, 90, 50, 40, 10, 9, 5, 4, 1];
    string[] numerals = ["M", "CM", "D", "CD", "C", "XC", "L", "XL", "X", "IX", "V", "IV", "I"];
    
    function solution(uint n) public view returns (string) {
        // Convert the positive integer to a Roman Numeral
        string memory res = "";

maymax777

pragma solidity ^0.4.13;

contract Repeater {
  function multiply(uint8 repeat, string pattern) returns (string) {
    bytes memory bpattern = bytes(pattern);
    uint resultLength = repeat * bpattern.length;
    string memory result = new string(resultLength);
    bytes memory bresult = bytes(result);
    for (uint i = 0; i < resultLength; i++) {
        bresult[i] = bpattern[i % bpattern.length];

maymax777

pragma solidity ^0.4.19;
contract Problem {
  function rowSumOddNumbers(int n) public pure returns (int) {
    int end = (1 + n ) * n - 1;
    int start = end - 2 * (n - 1);
    int sum = (start + end) * n / 2;
    return sum;
  }
}

maymax777

pragma solidity ^0.4.19;
contract Century {
  function get(int year) public pure returns (int) {
    return (year - 1) / 100 + 1;
  }
}

maymax777

pragma solidity ^0.4.19;

contract MaximumMultiple {
  function maxMultiple(int d, int b) public pure returns (int) {
    // 
    int max = d > b ? d : b;
    int min = d < b ? d : b;
    return max - max % min;
  }
}

maymax777

contract Staking {
    function isContract(address _target) internal view returns (bool) {
        if (_target == address(0)) {
            return false;
        }

        uint256 size;
        assembly {
            size := extcodesize(_target)
        }

maymax777

contract Multisend {
  function multisendEther(address[] memory recipients, uint256[] memory values)
    external
    payable
  {
    for (uint256 i = 0; i < recipients.length; i++)
      payable(recipients[i]).transfer(values[i]);
    uint256 balance = address(this).balance;
    if (balance > 0) payable(msg.sender).transfer(balance);
  }

maymax777

pragma solidity ^0.8.10;

contract ReEntrancyGuard {
    bool internal locked;

    modifier noReentrant() {
        require(!locked, "No re-entrancy");
        locked = true;
        _;
        locked = false;

maymax777

pragma solidity ^0.8.0;

import "@openzeppelin/contracts/proxy/utils/Initializable.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";

import "./DateTime.sol";

/**