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--) {
    long long n;
    cin >> n;
    long long ans = -1;
    for (int len = 1; len <= 18; len++) {
      for (char d = '1'; d <= '9'; d++) {
        if (stoll(string(len, d)) > n) {
          ans = stoll(string(len, d));
          break;
        }
      }
      if (ans != -1) break;
    }
    cout << ans << '\n';
  }
  return 0;  
}

Test 1

Group: 1, 2

Verdict: ACCEPTED

Test 2

Group: 2

Verdict: WRONG ANSWER