int main() {
    int n, k;
    cin >> n >> k;
    vector<int> a(n);
    cin >> a;
    vector<int> qa(k + 1);
    int cnt = 0, i = 0, j = n;
    for (int l = 0, r = 0; l < n; ++l) {
        while (r < n && cnt < k) {
            if (!qa[a[r]]) ++cnt;
            qa[a[r]]++;
            ++r;
        }
        if (cnt == k && r - l < j - i) {
            i = l, j = r;
        }
        qa[a[l]]--;
        if (qa[a[l]] == 0) --cnt;
    }
    cout << i + 1 << " " << j << '\n';
    return 0;
}