Lukujono

#include <iostream>

using namespace std;

int l(int n) {
    int le;
    for (le = 1; n != 1; le++) {
        int jj = n % 3;
        if (jj == 2) return -1;
        n = jj == 0 ? (n / 3) : (n * 2 + 1);
    }
    return le;
}

int main()
{
    int nums;
    cin >> nums;
    int n;

    for (int i = 0; i < nums; i++) {
        cin >> n;
        cout << l(n) << endl;
    }
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED