/in/foo.cc: In member function 'int SegmentTree::queryRange(SegmentTree::Node*, int, int)':
/in/foo.cc:217:5: warning: no return statement in function returning non-void [-Wreturn-type]
     }
     ^
/in/foo.cc: In member function 'int SegmentTree::queryRange(int, int)':
/in/foo.cc:221:5: warning: no return statement in function returning non-void [-Wreturn-type]
     }
     ^