Collatz conjecture

#include <iostream>
#include <vector>

using namespace std;

vector<int> collatz(int x) {
    vector<int> v;

    while (x != 1) {
        if (x % 2 == 0) {
            x /= 2;
        } else {
            x = 3 * x + 1;
        }
        v.push_back(x);
    }

    return v;
}

int main() {
    for (;;) {
        int n;
        cin >> n;
        cout << "> steps: " << collatz(n).size() << endl;
    }
    return 0;
}