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  1. //Bai12
  2.  
  3. #include<bits/stdc++.h>
  4. using namespace std;
  5. #define el "\n"
  6. #define ll long long
  7. #define ull unsigned long long
  8. #define se second
  9. #define fi first
  10. #define be begin()
  11. #define en end()
  12. #define Faster cin.tie(0); cout.tie(0); ios_base::sync_with_stdio(0);
  13. string s;
  14. void Run()
  15. {
  16.    cin >> s;
  17.    s = " " + s;
  18.    vector<string> vt;
  19.    int mid = s.size() / 2;
  20.    for(int i = 1; i <= mid; i++)
  21.    {
  22.        string tmp = "";
  23.        for(int j = mid - i + 1; j <= mid + i - 1; j++) tmp += s[j];
  24.        vt.push_back(tmp);
  25.    }
  26.    for(int i = 0; i < mid; i++) cout << vt[i] << el;
  27.    for(int i = mid - 2; i >= 0; i--) cout << vt[i] << el;
  28.  
  29. }
  30. int main()
  31. {
  32.     Faster;
  33.     Run();
  34.     return 0;
  35. }
  36.  
  37.  
Success #stdin #stdout 0.01s 5280KB
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https://ideone.com/4Jwtxg
language:
C++14 (gcc 8.3)
created:
3 days ago
visibility:
public

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