/in/foo.cc: In function 'void T::bld(T::N*&, int, int)':
/in/foo.cc:57:25: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
             int mid = l + r >> 1;
                       ~~^~~
/in/foo.cc: In function 'void T::qry(T::N*, int, int, int, int*)':
/in/foo.cc:67:25: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
             int mid = l + r >> 1;
                       ~~^~~
/in/foo.cc: In function 'void T::mdf(T::N*, int, int, int)':
/in/foo.cc:78:25: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
             int mid = l + r >> 1;
                       ~~^~~