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- #include <bits/stdc++.h>
- using namespace std;
- typedef long long LL;
- int n;
- const int MX=1e4;
- int gui[MX];
- int ar[MX],len[MX],link[MX];
- int main()
- {
- cin>>n;
- for(int i=0;i<n;i++)
- scanf("%d",ar+i);
- int maxlen=0;
- for(int i=0;i<n;i++)
- {
- int x=ar[i];
- int st=0,en=maxlen;
- int k=0;
- while(st<=en)
- {
- k=(st+en)/2;
- if(x<=len[k])
- en=k-1;
- else st=k+1;
- }
- len[st]=x;
- maxlen=max(maxlen,st);
- link[x]=len[st-1];
- gui[st]=x;
- }
- int temp=gui[maxlen];
- cout<<maxlen<<endl;
- cout<<gui[maxlen]<<' ';
- while(link[temp]!=0)
- {
- cout<<link[temp]<<' ';
- temp=link[temp];
- }
- return 0;
- }
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