/in/foo.cc: In function 'void build(int, int, int)':
/in/foo.cc:24:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   24 |     int mid=l+r>>1;
      |             ~^~
/in/foo.cc: In function 'void update(int, int, int, int)':
/in/foo.cc:35:20: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   35 |     int mid=tr[p].l+tr[p].r>>1;
      |             ~~~~~~~^~~~~~~~
/in/foo.cc: In function 'int query(int, int, int)':
/in/foo.cc:43:20: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   43 |     int mid=tr[p].l+tr[p].r>>1;
      |             ~~~~~~~^~~~~~~~