A special number

Language : C

(NOTE : Try a few times yourself before moving to the solution)

#include <stdio.h>

int sum_of_digits(int n){
  int sum=0,rem=0;
  if(n<10)
     return n;
  while (n>=10){
     rem = n % 10;
     sum+=rem;
     rem = n/10;
     if (rem < 10)
        sum += rem ;
     n = rem ;
  }
  return sum;
}
int main() {
  int Times,n,sum;
  scanf("%d",&Times);
  while(Times--){
     scanf("%d",&n);
     do
     {
        sum = sum_of_digits(n);
        n++;
     } while (sum % 4);
     printf("%d\n",n-1);
  }
  return 0;
}