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  1. #include <bits/stdc++.h>
  2.  
  3. using namespace std;
  4.  
  5. string s, news = "";
  6.  
  7. int sumDigit(string s)
  8. {
  9.     int ans = 0;
  10.     for (int i = 0; i < s.size(); i++) ans += (s[i] - '0');
  11.     return ans;
  12. }
  13.  
  14. int main()
  15. {
  16.     ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
  17.     freopen("NUMMAX.INP", "r", stdin);
  18.     freopen("NUMMAX.OUT", "w", stdout);
  19.     getline(cin, s);
  20.     for (int i = 0; i < s.size(); i++)
  21.         if (s[i] >= '0' && s[i] <= '9') news += s[i];
  22.     if (news.size() < 6) return cout << -1, 0;
  23.     while (news.size() > 6)
  24.     {
  25.         bool check = 0;
  26.         for (int i = 0; i < news.size() - 1; i++)
  27.         {
  28.             if (news[i] < news[i+1])
  29.             {
  30.                 news.erase(i, 1);
  31.                 check = 1;
  32.                 break;
  33.             }
  34.         }
  35.         if (!check) news.erase(news.size()-1, 1);
  36.     }
  37.     cout << news << '\n' << sumDigit(news);
  38. }
  39.  
Success #stdin #stdout 0.01s 5288KB
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https://ideone.com/txIuff
language:
C++14 (gcc 8.3)
created:
7 days ago
visibility:
public

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