#include <iostream>
#include <vector>

using namespace std;

int main() {

    std::ios::sync_with_stdio(false);
    std::cin.tie(0);

    int n;
    cin >> n;
    vector<int> baisu4;
    for (int i = 1; i < 1100; ++i) {
        if (i % 4 == 0) {
            baisu4.push_back(i);
        }
    }
    for (size_t j = 0; j < baisu4.size(); ++j) {
        if ((n - 100 <= baisu4.at(j)) && (baisu4.at(j) <= n + 100)) {
            cout << baisu4.at(j) << endl;
            break;
        }
    }
    return 0;
}