/in/foo.cc: In function 'num update(int, int, int, int, int)':
/in/foo.cc:6:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
 #define mid (l+r>>1)
              ~^~
/in/foo.cc:12:9: note: in expansion of macro 'mid'
  if (p<=mid) update(ls,l,mid,p,v);
         ^~~
/in/foo.cc:6:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
 #define mid (l+r>>1)
              ~^~
/in/foo.cc:12:26: note: in expansion of macro 'mid'
  if (p<=mid) update(ls,l,mid,p,v);
                          ^~~
/in/foo.cc:6:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
 #define mid (l+r>>1)
              ~^~
/in/foo.cc:13:17: note: in expansion of macro 'mid'
  else update(rs,mid+1,r,p,v);
                 ^~~
/in/foo.cc: In function 'num query(int, int, int, int, int)':
/in/foo.cc:6:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
 #define mid (l+r>>1)
              ~^~
/in/foo.cc:22:20: note: in expansion of macro 'mid'
  num q1=query(ls,l,mid,x,y),q2=query(rs,mid+1,r,x,y);
                    ^~~
/in/foo.cc:6:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
 #define mid (l+r>>1)
              ~^~
/in/foo.cc:22:41: note: in expansion of macro 'mid'
  num q1=query(ls,l,mid,x,y),q2=query(rs,mid+1,r,x,y);
                                         ^~~
/in/foo.cc: In function 'num update(int, int, int, int, int)':
/in/foo.cc:18:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^