/in/foo.cc: In function 'void build(long long int, long long int, long long int)':
/in/foo.cc:41:11: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  int mid=l+r>>1;
          ~^~
/in/foo.cc: In function 'long long int Query(long long int, long long int, long long int)':
/in/foo.cc:54:16: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  int mid=a[p].l+a[p].r>>1;
          ~~~~~~^~~~~~~