/in/foo.cc: In function 'int main()':
/in/foo.cc:6:12: warning: unused variable 'p' [-Wunused-variable]
  int n, m, p, i, j, q, count=0;
            ^
/in/foo.cc:6:21: warning: unused variable 'q' [-Wunused-variable]
  int n, m, p, i, j, q, count=0;
                     ^
/in/foo.cc:6:24: warning: unused variable 'count' [-Wunused-variable]
  int n, m, p, i, j, q, count=0;
                        ^~~~~