func_code_string: #include <bits/stdc++.h>   using namespace std;   bool isBeautiful(int n) {     bool flag[10];     for (int i = 0; i < 10; i++) flag[i] = false;     while (n > 0) {       int digit = n % 10;       if (flag[digit]) return false;       flag[digit] = true;       n = n / 10;     }     return true;   }   int main() {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     int n;     cin >> n;     if (isBeautiful(n)) n++;     while (!isBeautiful(n)) {       n++;     }     cout << n;     return 0;   }   