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  1.  
  2. #include <bits/stdc++.h>
  3. using namespace std;
  4. #define ll long long
  5. #define endl '\n'
  6. ll N = 1e9+7;
  7. ll oo =1e13;
  8. const ll maxx = 1000000 + 3;
  9. ll n,m,k,q,x,y,z,l,r,mid,ans;
  10. string s;
  11. map<char,ll>mp;
  12. unordered_set<string>ss;
  13. void go(string s1) {
  14.     if (s1.size()>s.size())return;
  15.     if (s1.size() == s.size()) {
  16.         map<char,ll>mp1;
  17.         for (char c:s1){mp1[c]++;}
  18.  
  19.         for(auto &it:mp1) {
  20.             if (it.second != mp[it.first]) return;
  21.         }
  22.         ss.insert(s1);
  23.     }
  24.  
  25.     for (ll i=0;i<s.size();i++) {
  26.         go(s1+s[i]);
  27.     }
  28.  
  29. }
  30. void solve() {
  31.     cin>>s;
  32.     for (char c:s){mp[c]++;}
  33.     go("");
  34.  
  35.     ll size=ss.size();
  36.     cout<<size<<endl;
  37.     vector<string>v(ss.begin(),ss.end());
  38.     sort(v.begin(),v.end());
  39.     for (auto &it:v)cout<<it<<endl;
  40. }
  41. int main() {
  42.     ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
  43.     ll t=1 ;
  44.     // cin >>t;
  45.     while (t--) {
  46.         ans=0;
  47.         solve();
  48.     }
  49. }
Success #stdin #stdout 0.01s 5320KB
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https://ideone.com/F07ahA
language:
C++ (gcc 8.3)
created:
12 hours ago
visibility:
public

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