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Dec 8th, 2019
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  1. #include<iostream>
  2.  
  3. using namespace std;
  4.  
  5. int x[100],b[100],n,p,nr=0, sum=0;
  6.  
  7. void Write(int p)
  8. { for(int i=1;i<=p;i++) cout<<x[i];
  9. cout<<endl;
  10. int a=0;
  11. for(int i=1;i<=p;i++) a=a*10+x[i];
  12. sum=sum+a;
  13. nr++;
  14. }
  15. void ar(int k, int p)
  16. { for(int i=1;i<=9;i=i+2)
  17. if(!b[i])
  18. { x[k]=i;
  19. b[i]=1;
  20. if(k==p) Write(p);
  21. else ar(k+1,p);
  22. b[i]=0;
  23. }
  24. }
  25.  
  26. int main() {
  27.  
  28.  
  29. for(p=1;p<=5;p++) ar(1,p);
  30. cout<<"sum is"<<sum<<" from "<<nr<< "numbers";
  31.  
  32.  
  33. }
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