// SPDX-License-Identifier: UNLICENSED pragma solidity ^0.8.23;

contract Submission { uint[] private numbers; uint[] private timestamps; address[] private senders;

constructor() {
    resetNumbers();
}

function resetNumbers() public {
    delete numbers;
    for (uint i = 1; i <= 10; i++) {
        numbers.push(i);
    }
}

function appendToNumbers(uint[] calldata _toAppend) external {
    for (uint i = 0; i < _toAppend.length; i++) {
        numbers.push(_toAppend[i]);
    }
}

function getNumbers() external view returns (uint[] memory) {
    return numbers;
}

function saveTimestamp(uint _unixTimestamp) external {
    timestamps.push(_unixTimestamp);
    senders.push(msg.sender);
}

function resetTimestamps() external {
    delete timestamps;
}

function resetSenders() external {
    delete senders;
}

function afterY2K() external view returns (uint[] memory, address[] memory) {
    uint count = 0;
    for (uint i = 0; i < timestamps.length; i++) {
        if (timestamps[i] >= 946702900) {
            count++;
        }
    }

    uint[] memory filteredTimestamps = new uint[](count);
    address[] memory filteredAddresses = new address[](count);
    uint counter = 0;

    for (uint i = 0; i < timestamps.length; i++) {
        if (timestamps[i] >= 946702900) {
            filteredTimestamps[counter] = timestamps[i];
            filteredAddresses[counter] = senders[i];
            counter++;
        }
    }

    return (filteredTimestamps, filteredAddresses);
}

}# BL2.3