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- #include <iostream>
- #include <fstream>
- using namespace std;
- ifstream fin("citire.txt");
- int n,st[50],a[50][50];
- void Citire(int &n)
- {
- int i, j;
- fin>>n;
- while(fin>>i>>j)
- {
- a[i][j]=a[j][i]=1;
- }
- fin.close();
- }
- int valid(int k)
- {
- if(!a[st[k-1]][st[k]])
- return 0;
- for(int i=1;i<k;i++)
- if(st[k]==st[i])
- return 0;
- if(k==n && !a[1][st[k]])
- return 0;
- return 1;
- }
- int sol(int k)
- {
- return k==n;
- }
- void tipar()
- {
- for(int i=1;i<=n;i++)
- cout<<st[i]<<" ";
- cout<<endl;
- }
- void bkt(int k)
- {
- for(int i=1;i<=n;i++)
- {
- st[k]=i;
- if(valid(k))
- {
- if(sol(k))
- tipar();
- else
- bkt(k+1);
- }
- }
- }
- int main()
- {
- Citire(n);
- st[1]=1;
- bkt(2);
- return 0;
- }
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