foo.cc: In function ‘void upd(int, int, int, int)’:
foo.cc:10:16: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses]
   10 |         int m=l+r>>1;
      |               ~^~
foo.cc: In function ‘double qry(int, int, int)’:
foo.cc:16:16: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses]
   16 |         int m=l+r>>1;
      |               ~^~

正在同步测试数据，请稍后