Submission #8322208

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Source Code Expand

#include <bits/stdc++.h>
using namespace std;

string s, ans;
set<char> st;

int main() {
  cin >> s;
  sort(s.begin(), s.end());
  for(int i = 0; i < s.size(); ++i) st.insert(s[i]);
  for(auto c : st) {
    ans += c;
    ans += c;
  }
  cout << ans << endl;
  return 0;
}

Submission Info

Judge Result