/in/foo.cc: In function 'void Build(int, int, int)':
/in/foo.cc:35:11: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  int mid=l+r>>1;
          ~^~
/in/foo.cc: In function 'long long int Query(int, int, int)':
/in/foo.cc:52:20: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  int mid=tree[rt].l+tree[rt].r>>1;
          ~~~~~~~~~~^~~~~~~~~~~
/in/foo.cc: In function 'void Update(int, int, int, long long int)':
/in/foo.cc:67:20: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  int mid=tree[rt].l+tree[rt].r>>1;
          ~~~~~~~~~~^~~~~~~~~~~