Greater Integers

#include <bits/stdc++.h>

using namespace std;

#define rep(i, a, b) for (int i = a; i < (b); ++i)
#define per(i, a, b) for (int i = a - 1; i >= (b); --i)
#define trav(a, x) for (auto &a : x)

#define all(x) x.begin(), x.end()
#define sz(x) x.size()
#define pb push_back

#define umap unordered_map
#define uset unordered_set
#define INF 1000000000

typedef pair<int, int> ii;
typedef pair<int, ii> iii;
typedef vector<int> vi;
typedef vector<ii> vii;
typedef long long ll;

int main() {
    ios::sync_with_stdio(0);
    cin.tie(NULL);

    int tc;
    string num, ans;
    cin >> tc;
    while (tc--) {
        cin >> num;
        ans = string(sz(num), num[0]);
        if (stoll(ans) <= stoll(num)) ans = num[0] != '9' ? string(sz(num), num[0] + 1) : string(sz(num) + 1, '1');
        cout<<ans<<endl;
    }
    return 0;
}

Test 1

Group: 1, 2

Verdict: ACCEPTED

Test 2

Group: 2

Verdict: ACCEPTED