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Mar 22nd, 2018
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  1. #include <bits/stdc++.h>
  2.  
  3. using namespace std;
  4.  
  5. //Rail Fence Cipher
  6.  
  7. int main(){
  8. string s;
  9. int row;
  10. cin>>s>>row;
  11. int i,j,k=0;
  12. string c[row];
  13. int x[row];
  14. for(i=0;i<row;i++)
  15. x[i]=0;
  16. while(k!=s.length()){
  17. for(i=0;i<row;i++){
  18. c[i][x[i]]=s[k];
  19. k++;
  20. x[i]++;
  21. if(k==s.length())
  22. break;
  23. }
  24. if(k==s.length())
  25. break;
  26. for(i=row-2;i>0;i--){
  27. c[i][x[i]]=s[k];
  28. k++;
  29. x[i]++;
  30. if(k==s.length())
  31. break;
  32. }
  33. }
  34. for(i=0;i<row;i++){
  35. for(j=0;j<x[i];j++)
  36. cout<<c[i][j];
  37. }
  38. return 0;
  39. }
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