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Oct 15th, 2019
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  1. #include<iostream>
  2. using namespace std;
  3. int A[101][101],n,m,grade[100];
  4. int ok;
  5. void citire()
  6. {int i,x,y;
  7. cin>>n>>m;
  8. for(i=1; i<=m; i++)
  9. {
  10. cin>>x>>y;
  11. A[x][y]=1;
  12. }
  13. }
  14. int grad_intern(int x)
  15. {
  16. int i,gradin=0;
  17. for(i=1; i<=n; i++)
  18. gradin=gradin+A[i][x];
  19. return gradin;
  20. }
  21. int main()
  22. {
  23. int i;
  24. citire();
  25. for(i=1; i<=n; i++)
  26. if(grad_intern(i)==0)
  27.  
  28. {
  29. cout<<i<<' ';
  30. ok=1;
  31.  
  32. }
  33. if(ok==0)
  34. cout<<"NU EXISTA";
  35. }
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