/in/foo.cc: In function 'void build(long long int, long long int, long long int, int)':
/in/foo.cc:31:10: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  ll mid=l+r>>1;
         ~^~
/in/foo.cc: In function 'void update(long long int, long long int, long long int)':
/in/foo.cc:50:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  int mid=E[id].l+E[id].r>>1;
          ~~~~~~~^~~~~~~~