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  1. #include <bits/stdc++.h>
  2. #include <math.h>
  3. using namespace std;
  4. using ll = long long;
  5. using ull = unsigned long long;
  6. #define el '\n'
  7. #define fastio ios::sync_with_stdio(false), cin.tie(0), cout.tie(0)
  8. #define all(v) v.begin(), v.end()
  9. #define fixed(n) fixed << setprecision(n)
  10. const int d4x[4]={0, 1, 0, -1}, d4y[4]={1, 0, -1, 0};
  11. // const int d8x[8]={0, 1, 1, 1, 0, -1, -1, -1}, d8y[8]={1, 1, 0, -1, -1, -1, 0, 1};
  12. #define id(c) ((c) - 'a' + 1)
  13. #define ch(i) ((i) + 'a' - 1)
  14. template <typename T>
  15. void printv(const vector<T>& v) {
  16.     for (const auto& x : v) cout << x << ' ';
  17.     cout << '\n';
  18. }
  19.  
  20. void fileIO() {
  21. #ifndef ONLINE_JUDGE
  22.     freopen("input.txt", "r", stdin);
  23.     freopen("output.txt", "w", stdout);
  24. #endif
  25. }
  26. bool valid(string s) {
  27.     char diff = s[1] - s[0];
  28.     for (int i = 2; i < s.size(); i++)
  29.     {
  30.         if(s[i] - s[i-1] != diff) return false;
  31.     }
  32.     return true;
  33. }
  34. ll vtoll(vector<int> &v) {
  35.     string s  = "";
  36.     for (int i = 0; i < v.size(); i++)
  37.     {
  38.         s += v[i] + '0';
  39.     }
  40.     return stoll(s);
  41. }
  42. void solve() {
  43.     ll n; cin >> n;
  44.     if(n < 100) return void(cout << n);
  45.     string s = to_string(n);
  46.     vector<int> v, temp;
  47.  
  48.     for (int i = 0; i < s.size(); i++)
  49.     {
  50.         v.push_back(s[i] - '0');
  51.     }
  52.     vector<ll> st;
  53.     for (int i = 0; i < 5; i++)
  54.     {
  55.         for (int w = 0; w < 10; w++)
  56.         {
  57.             temp.clear();
  58.             for (int k = 0; k < s.size(); k++)
  59.             {
  60.                 temp.push_back(w);
  61.             }
  62.             st.push_back(vtoll(temp));
  63.             bool c = 1;
  64.             for (int j = 1; j < temp.size(); j++)
  65.             {
  66.                 temp[j] = i + temp[j-1];
  67.                 if(temp[j] > 9) c = 0;
  68.             }
  69.             if(c) {
  70.                 st.push_back(vtoll(temp));
  71.                 reverse(temp.begin(), temp.end());
  72.                 st.push_back(vtoll(temp));
  73.             }
  74.         }
  75.     }
  76.     sort(all(st));
  77.     // printv(st);
  78.     cout << *lower_bound(all(st), n);
  79.  
  80. }
  81.  
  82. int main() {
  83.     fastio;
  84.     fileIO();
  85.     // int t; cin >> t;
  86.     // while (t--)
  87.         solve();
  88. }
Success #stdin #stdout 0.01s 5348KB
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https://ideone.com/MZVeW1
language:
C++ (gcc 8.3)
created:
8 hours ago
visibility:
public

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