[Luogu] 逛公園

https://www.luogu.org/problemnew/show/P3953 https://www.zybuluo.com/wsndy-xx/note/1134388     #include<cstdio> #include<cstring> #include<cctype> using namespace std; const int N=1e5+1,K=51; int n,m

>>阅读原文<<