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  1. #include <bits/stdc++.h>
  2. #define ll long long
  3. #define faster()                   \
  4.     ios_base ::sync_with_stdio(0); \
  5.     cin.tie(NULL);                 \
  6.     cout.tie(NULL);
  7. #define FOr(i, a, b) for (int i = a; i < b; i++)
  8. #define FOR(i, a, b) for (int i = a; i <= b; i++)
  9. using namespace std;
  10. string s = "";
  11. void solve(int pos)
  12. {
  13.     if (s.size() == 10)
  14.     {
  15.         if (s[6] != '0' && s[3] != '2')
  16.         {
  17.             string tmp = s;
  18.             reverse(tmp.begin(), tmp.end());
  19.             if (s == tmp)
  20.             {
  21.                 cout << s << endl;
  22.             }
  23.         }
  24.         return;
  25.     }
  26.     if (pos == 2 || pos == 5)
  27.     {
  28.         s.push_back('/');
  29.         solve(pos + 1);
  30.         s.pop_back();
  31.     }
  32.     else
  33.     {
  34.         s.push_back('0');
  35.         solve(pos + 1);
  36.         s.pop_back();
  37.         s.push_back('2');
  38.         solve(pos + 1);
  39.         s.pop_back();
  40.     }
  41. }
  42. int main()
  43. {
  44.     solve(0);
  45. }
  46.  
Success #stdin #stdout 0s 5288KB
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https://ideone.com/sPSnrG
language:
C++ (gcc 8.3)
created:
4 days ago
visibility:
public

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