/in/foo.cc: In function 'int main()':
/in/foo.cc:28:15: warning: unused variable 'R' [-Wunused-variable]
  int p, K, D, R = 0;
               ^
/in/foo.cc:30:6: warning: unused variable 'k' [-Wunused-variable]
  int k = cptoten(K, p), d = cptoten(D, p);
      ^
/in/foo.cc:30:25: warning: unused variable 'd' [-Wunused-variable]
  int k = cptoten(K, p), d = cptoten(D, p);
                         ^