/in/foo.cc: In function 'void query(int, int)':
/in/foo.cc:50:6: warning: unused variable 'mip' [-Wunused-variable]
  int mip=0,t=0;
      ^~~
/in/foo.cc:50:12: warning: unused variable 't' [-Wunused-variable]
  int mip=0,t=0;
            ^
/in/foo.cc: In function 'bool find(int)':
/in/foo.cc:79:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^