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- #include <fstream>
- #define N 101
- using namespace std;
- int n,k,t[N],v[N],nf[N];
- void dfs(int k)
- {
- v[k]=1;
- for(int i=1;i<=n;++i)
- if(t[i]==k)
- nf[k]=1,dfs(i);
- }
- int main()
- {
- ifstream f("subarbore1.in");
- f>>n>>k;
- for(int i=1;i<=n;++i)
- f>>t[i];
- f.close();
- dfs(k);
- ofstream g("subarbore1.out");
- for(int i=1;i<=n;++i)
- if(v[i]&&!nf[i])
- g<<i<<' ';
- g.close();
- return 0;
- }
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