func_code_string: #include <bits/stdc++.h>   using namespace std;   int sum(int a) {     int s = 0;     while (a > 0) {       s += (a % 10);       a = a / 10;     }     return s;   }   int main() {     int n, a, b;     cin >> n;     while (sum(n) % 4 != 0) {       n++;     }     cout << n << endl;     return 0;   }   