摘要：The 2021 ICPC Asia Kunming Regional Contest D-Divisions 做法：我们发现，当构造成a a a b b b c c c $(a<b<c)$这样的时候，答案就是$2^{num(a)}-1+2^{num(b)}-1+2^{num(c)}-1+1$,我们 阅读全文

摘要：The 2021 ICPC Asia Nanjing Regional Contest A Oops, It’s Yesterday Twice More 点击查看代码 #include <bits/stdc++.h> using namespace std; string s[5]={"","UL 阅读全文