/in/foo.cc: In member function 'void Tree::Build(int, int, int&, int, int)':
/in/foo.cc:26:16: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   int mid=(LL)l+r>>1;
           ~~~~~^~
/in/foo.cc: In member function 'int Tree::Query(int, int, int, int, int)':
/in/foo.cc:33:16: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   int mid=(LL)l+r>>1,tmp=Siz[son[nowr][0]]-Siz[son[nowl][0]],t;
           ~~~~~^~