Suuremmat

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

int main() {
	ios_base::sync_with_stdio(false);
	cin.tie(0);

	int t;
	cin >> t;
	
	while (t--) {
		string s;
		cin >> s;

		int n = s.length();

		char b = s[0];
		bool ok = 1;
		bool ok2 = 0;
		for (char c : s) {
			if ((int)c < (int)b) {
				ok2 = 1;
				break;
			}
			if ((int)c > (int)b) ok = 0;
			if (c != b) ok2 = 1;
		}
		if (ok && !ok2) ok = 0;
		if (!ok && b == '9') {
			++n;
			b = '1';
		} else if (!ok) b = (char)((int)b + 1);

		for (int i = 0; i < n; ++i) cout << b;
		cout << '\n';
	}
}

Test 1

Group: 1, 2

Verdict: ACCEPTED

Test 2

Group: 2

Verdict: ACCEPTED