/in/foo.cc: In function 'int bins(int, int)':
/in/foo.cc:26:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   int mid=l+r>>1;
           ~^~
/in/foo.cc: In function 'void build(int, int&, int, int, int)':
/in/foo.cc:35:11: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  int mid=l+r>>1;
          ~^~
/in/foo.cc: In function 'int query(int, int, int, int)':
/in/foo.cc:42:11: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  int mid=l+r>>1;
          ~^~