#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  cin >> n;
  int m = n;
  int sum = 0;
  while (1) {
    n = m;
    sum = 0;
    while (n > 0) {
      sum += n % 10;
      n = n / 10;
    }
    if (sum % 4 == 0)
      break;
    else
      m++;
  }
  cout << m;
}
