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- #include <iostream>
- using namespace std;
- int st[20],n;
- char v[20][10];
- void tipar(int k)
- {
- for(int i=1;i<=k;i++)
- cout<<st[i]<<" ";
- cout<<endl;
- }
- int valid(int k)
- { int c1,c2;
- if((k==2)&&(st[k]!=c1))
- return 0;
- if((k==n-1)&&(st[k]!=c2))
- return 0;
- for(int i=1;i<k;i++)
- if(st[k]==st[i])
- return 0;
- return 1;
- }
- int solutie(int k)
- {
- return(k==n);
- }
- void bktr()
- {
- int k=1;
- st[k]=0;
- while(k>0)
- {
- if(st[k]<n)
- {
- st[k]++;
- if(valid(k))
- if(solutie(k))
- tipar(k);
- else
- {
- k++;
- st[k]=0;
- }
- }
- else k--;
- }
- }
- int main()
- { for(int i=1;i<=n;i++)
- cin>>v[i];
- cout<<"n=";cin>>n;
- bktr();
- return 0;
- }
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