将`air[++tot]=get_point(air[tot-1],air[tot-2],air[tot-3]);`
改为`tot++,air[tot]=get_point(air[tot-1],air[tot-2],air[tot-3]);`
by h_rains @ 2023-07-25 16:59:35
否则tot-1,tot-2,tot-3值会出错
by xin20110426 @ 2023-07-25 17:02:11
orz%%%%%%%%
by hyfcabbyblue @ 2023-07-25 18:33:40
@[h_rains](/user/665801) 感谢，已AC
by sjr3065335594 @ 2023-07-25 19:06:53