/in/foo.cc: In function 'int main()':
/in/foo.cc:4:10: warning: variable 'k' set but not used [-Wunused-but-set-variable]
  int n,q,k,p,t;
          ^
/in/foo.cc:4:14: warning: variable 't' set but not used [-Wunused-but-set-variable]
  int n,q,k,p,t;
              ^