func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int n;     cin >> n;     while (n <= 70000) {       ++n;       int x = n;       int a[10] = {0};       for (int i = 0; i < 4; i++) {         int m = x % 10;         ++a[m];         x = x / 10;       }       int count = 0;       for (int i = 0; i < 10; i++) {         if (a[i] == 1) ++count;       }       if (count == 4) {         cout << n;         break;       }     }   }   