#include <iostream>
using namespace std;
bool f(int n) {
int res = 0;
while (n) {
res += n % 10;
n /= 10;
}
return res % 4 == 0;
}
int main() {
int n;
cin >> n;
while (!f(n)) {
++n;
}
cout << n << endl;
return 0;
}