摘要:
题意:n // include define fi first define se second define db double define mp make_pair define pb push_back define mt make_tuple define pi acos( 1.0) de 阅读全文
摘要:
题意:求a[1:i]的2 |border| // include define fi first define se second define db double define mp make_pair define pb push_back define mt make_tuple define 阅读全文