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- #include <iostream>
- #include <fstream>
- using namespace std;
- int st[10], a[10], n, nr;
- void Init(int k)
- {
- st[k] = 0;
- }
- int Succesor(int k)
- {
- if(st[k] < n)
- {
- st[k]++;
- return 1;
- }
- return 0;
- }
- int Valid(int k)
- {
- for(int i = 1; i < k; i++)
- if(st[k] == st[i])
- return 0;
- else if((a[st[i]] == a[st[i+1]]+1) || (a[st[i]] == a[st[i+1]]-1))
- return 0;
- return 1;
- }
- int Solutie(int k)
- {
- if(k == n+1)
- return 1;
- return 0;
- }
- void Citire()
- {
- int x;
- ifstream fin("shuffle.in");
- fin >> n;
- for(int i = 1; i <= n; i++)
- {
- fin >> x;
- a[x] = i;
- }
- fin.close();
- }
- ofstream fout("shuffle.out");
- void Tipar()
- {
- for(int i = 1; i <= n; i++)
- fout << st[i] << " ";
- fout << "\n";
- }
- void backtrack(int k)
- {
- if(Solutie(k))
- {
- Tipar();
- nr++;
- }
- else
- {
- Init(k);
- while(Succesor(k))
- if(Valid(k))
- backtrack(k+1);
- }
- }
- int main()
- {
- Citire();
- backtrack(1);
- if(!nr) fout << "nu exista";
- return 0;
- }
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