09 2021 档案
摘要:#include<cstdio> #include<algorithm> #include<ctime> using namespace std; int n,m,root,tot = 0; struct tree{ int ls,rs,v,siz,rnd,tag; }tr[100005]; int
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摘要:#include<cstdio> #include<algorithm> #include<ctime> using namespace std; int n,tot = 0; struct tree{ int siz,ls,rs,v,rnd; }tr[100005]; int add(int va
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