#include <stdlib.h>
#include <math.h>

int main() {
  unsigned long long int p = 23;
  unsigned long long int g = 5;
  unsigned long long int a = 6;
  unsigned long long int b = 15;
  unsigned long long int A = std::fmod(pow(g, a), p);
  unsigned long long int B = std::fmod(pow(g, b), p);
  unsigned long long int ba = std::fmod(pow(B, a), p);
  unsigned long long int ab = std::fmod(pow(A, b), p);
  return 1;
}