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Jun 1st, 2016
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  1. #include <fstream>
  2. using namespace std;
  3. ifstream f("graf.in");
  4. ofstream g("graf.out");
  5. int n,a[101][101];
  6. int main()
  7. { f>>n;
  8. int i,j;
  9. for(i=1;i<=n;i++){
  10. for(j=1;j<=n;j++){
  11. f>>a[i][j];
  12. }
  13. }
  14. int c=0;
  15. for(i=1;i<=n;i++){
  16. int gr=0;
  17. for(j=1;j<=n;j++)
  18. if(a[i][j]==1) gr++;
  19. if(gr==3) c++;
  20. }
  21. g<<c;
  22. f.close();
  23. g.close();
  24. return 0;
  25. }
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