arc-std.cpp

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

using ll = int64_t;
void solve()
{
    ll K;
    cin >> K;
    K--;
    ll cnt = 1;
    int d = 0;
    while (true)
    {
        d++;
        cnt *= 9;
        if (K >= cnt)
        {
            K -= cnt;
        }
        else
        {
            vector<int> digits;
            for (int i = 0; i < d; i++)
            
            {
                digits.push_back(K % 9);
                K /= 9;
            }
            reverse(digits.begin(), digits.end());
            digits[0]++;
            for (int i = 1; i < d; i++)
            {
                if (digits[i] >= digits[i - 1])
                    digits[i]++;
            }
            for (int a : digits)
                cout << a;
            cout << '\n';
            break;
        }
    }
}

int main()
{
    ios_base::sync_with_stdio(false), cin.tie(nullptr);
    int T;
    cin >> T;
    while (T--)
        solve();
}