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Feb 24th, 2020
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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3. ifstream in("ciclu.in");
  4. ofstream out("ciclu.out");
  5. int a[101][101],n,m,v[101],x,y,p,ok,pas[101];
  6. inline void tipar(int k)
  7. {
  8. for(int i=1;i<=k;i++)
  9. out<<v[i]<<" ";
  10. }
  11. inline void backrec(int k)
  12. {
  13. for(int i=1;i<=n;i++)
  14. {
  15. if(!pas[i] && a[v[k-1]][i])
  16. {
  17. v[k]=i;
  18. pas[i]=1;
  19. if(v[k]==p && k>3 && !ok)
  20. tipar(k),ok=1;
  21. else
  22. backrec(k+1);
  23. pas[i]=0;
  24. }
  25. }
  26. }
  27. int main()
  28. {
  29. in>>n>>m;
  30. for(int i=1;i<=m;i++)
  31. {
  32. in>>x>>y;
  33. a[x][y]=a[y][x]=1;
  34. }
  35. in>>p;
  36. v[1]=p;
  37. backrec(2);
  38. }
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