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- #include <iostream.h>
- int v[20],n,c1,c2;
- int cont(int k){
- for(int i=1;i<k;i++)
- if(v[k]==v[i])
- return 0;
- return 1;
- }
- int sol(int k){
- return n==k;
- }
- void afisare(int k){
- for(int i=1;i<=k;i++)
- cout<<v[i]<<' ';
- cout<<endl;
- }
- void back(int k){
- if(k==2 || k==n-1)
- back(k+1);
- else
- for(int i=1;i<=n;i++){
- if(i!=c1 && i!=c2){
- v[k]=i;
- if(cont(k))
- if(sol(k))
- afisare(k);
- else
- back(k+1);
- }
- }
- }
- int main (){
- cin>>n>>c1>>c2;
- v[2]=c1; v[n-1]=c2;
- back(1);
- }
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