Greater Integers

#include <bits/stdc++.h>

using namespace std;

using ll = long long;

ll get (int cif, ll p) {
    return cif * (p * 10 - 1) / 9;
}

void solveTest () {
    ll n;
    cin >> n;
    ll p = 1;
    while (p * 10 <= n) p *= 10;
    if (get (9, p) <= n) cout << (p * 100 - 1) / 9 << "\n";
    else {
        int cif = 9;
        while (cif > 0 && get (cif - 1, p) > n)
            cif--;
        if (cif > 0)
            cout << get (cif, p) << "\n";
        else
            cout << p - 1 << "\n";
    }
}

int main () {
    int t;
    cin >> t;
    while (t--)
        solveTest ();
    return 0;
}

Test 1

Group: 1, 2

Verdict: ACCEPTED

Test 2

Group: 2

Verdict: WRONG ANSWER