循环那里，应该是从$x$到$y$ @[bjqxszx_zhongqide](/user/1013002) by zhouyiran_2011 @ 2024-02-17 09:46:05
@[zhouyiran_2011](/user/571937) AC了谢谢 by bjqxszx_zhongqide @ 2024-02-17 10:27:52