/in/foo.cc: In function 'void Bd(int, int, int)':
/in/foo.cc:55:9: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  int m=l+r>>1;
        ~^~
/in/foo.cc: In function 'void Ud(int, int, int, int)':
/in/foo.cc:79:16: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  int m=tr[rt].l+tr[rt].r>>1;
        ~~~~~~~~^~~~~~~~~
/in/foo.cc: In function 'int Qy(int, int, int)':
/in/foo.cc:93:16: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  int m=tr[rt].l+tr[rt].r>>1;
        ~~~~~~~~^~~~~~~~~