func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     string n;     cin >> n;     reverse(n.begin(), n.end());     int k = n[0] + 10 * n[1];     if (k % 4 == 0) {       cout << 4 << endl;     } else {       cout << 0 << endl;     }   }   