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- #include <iostream>
- using namespace std;
- int v[5]={2,3,5,7};
- int st[10], n;
- int valid(int niv)
- {
- for(int i=0; i<4; i++)
- if(st[niv]==v[i]) return 1;
- return 0;
- }
- void afisare_stiva()
- {
- int i;
- for(i=1; i<=n; i++)
- cout<<st[i];
- cout<<endl;
- }
- void back(int nivel)
- {
- if (nivel>n) afisare_stiva();
- else
- {
- for(int i=1; i<=9; i++)
- {
- st[nivel]=i;
- if(valid(nivel)) back(nivel+1);
- }
- }
- }
- int main()
- {
- cin>>n;
- back(1);
- return 0;
- }
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