foo.cc: In function ‘int main()’:
foo.cc:9:23: warning: variable ‘y’ set but not used [-Wunused-but-set-variable]
    9 |         int m,n,e,z,x,y;
      |                       ^
foo.cc:14:13: warning: unused variable ‘g’ [-Wunused-variable]
   14 |         int g;
      |             ^