/in/foo.cc: In function 'int main()':
/in/foo.cc:18:17: warning: unused variable 'key2' [-Wunused-variable]
  int now=-1,key,key2,now2=-1;
                 ^~~~
/in/foo.cc:25:2: warning: 'key' may be used uninitialized in this function [-Wmaybe-uninitialized]
  if(key!=1) {
  ^~