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- #include <iostream.h>
- #include <fstream.h>
- ifstream f("citire.in");
- int a[100][100], i, j, n, p, q, sol, x[100], k;
- void citire()
- {
- f>>n;
- for(i=1; i<=n; i++)
- for(j=1; j<=n; j++)
- f>>a[i][j];
- f>>p>>q;
- }
- int cont(int k)
- {
- for(i=1; i<k; i++)
- if(x[i]==x[k])
- return 0;
- if(k>1)
- if(a[x[k]][x[k-1]]==0)
- return 0;
- return 1;
- }
- void afis(int k)
- {
- for(i=1; i<=k; i++)
- cout<<x[i]<<" ";
- cout<<'\n';
- sol++;
- }
- void back()
- {
- int k=0; x[k]=0;
- do
- {
- while(x[k]<n)
- {
- x[k]++;
- if(cont(k))
- if(x[k]==q)
- afis(k);
- else
- {
- k++;
- x[k]=0;
- }
- }
- k--;
- } while(k>1);
- }
- int main()
- {
- citire();
- x[1]=p;
- back();
- cout<<"Avem "<<sol<<" solutii.";
- return 0;
- }
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