Greater Integers

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

int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);  
  int t;
  cin >> t;
  while (t--) {
    string n;
    cin >> n;
    int len = (int) n.length();
    char d = n[0];
    if (n[0] < *max_element(n.begin(), n.end()) || n == string(len, n[0])) {
      if (d == '9') {
        d = '1';
        len++;
      } else {
        d++;
      }
    }
    cout << string(len, d) << '\n';
  }
  return 0;  
}

Test 1

Group: 1, 2

Verdict: WRONG ANSWER

Test 2

Group: 2

Verdict: WRONG ANSWER