Task 4

#include <iostream>

using namespace std;

bool repid(int i)
{
    string s;
    int ostatok;
    while(i > 0)
    {
        ostatok = i % 3;
        i /= 3;
        s += to_string(ostatok);
    }
    bool ans = 1;
    for (int i = 1; i < s.size(); i++)
    {
        if (s [i] != s [i - 1])
            ans = 0;
    }
    return ans;
}

int main()
{
    int l, r;
    cin >> l >> r;
    int minans = -1, maxans = -1;
    for (int i = l; i <= r; i++)
    {
        if (repid(i))
        {
            maxans = i;
            if (minans == -1)
                minans = i;
        }
    }
    cout << minans << " " << maxans;
}