有人吗！！
by Viston @ 2018-08-12 20:50:57
现在写萌新刚学OI还有用吗...
by Viston @ 2018-08-12 20:54:37
@[Viston](/space/show?uid=107101)
if(e==1)ans+=(c[1]-d);
else ans+=min(c[e]-d,d-c[e-1]);
by 追风少年σχ @ 2018-11-03 23:16:36