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Sep 20th, 2018
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  1. #include <iostream>
  2. #include <algorithm>
  3. #include <vector>
  4. #include <sstream>
  5. #include <cstring>
  6.  
  7. #define ll long long
  8. #define pb push_back
  9.  
  10. using namespace std;
  11.  
  12.  
  13. int main() {
  14.  
  15. ll n;
  16.  
  17. vector <ll> ans;
  18.  
  19. cin >> n;
  20.  
  21. for (ll i = 0; i <= n; i++) {
  22. string s;
  23. stringstream ss , ss1;
  24. ll b;
  25.  
  26. ss << i;
  27. ss >> s;
  28.  
  29. reverse(s.begin() , s.end());
  30.  
  31. ss1 << s;
  32. ss1 >> b;
  33.  
  34. if (i + b == n)
  35. ans.pb(i);
  36. }
  37.  
  38. for (auto i: ans)
  39. cout << i << " ";
  40.  
  41. cout << ans.size();
  42.  
  43. return 0;
  44. }
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