sourcekeeper_42-contract-lab/contracts/LabHelper.sol

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.24;

contract Main {
    string public topic;

    constructor(string memory initialTopic) {
        topic = initialTopic;
    }

    function setTopic(string calldata nextTopic) external {
        topic = nextTopic;
    }
}