void solve() throws IOException {
    int n = readInt();
    int[] a = new int[n];
    int s = 0;
    for (int i = 0; i < n; i++) {
        a[i] = readInt();
        s += a[i];
    }
    if (s % n != 0) {
        out.println("Unrecoverable configuration.");
        return;
    }
    int mid = s / n;
    int dif = 0;
    for (int i = 0; i < n; i++) {
        if (a[i] != mid) dif++;
    }
    if (dif == 0) {
        out.println("Exemplary pages.");
        return;
    }
    if (dif != 2) {
        out.println("Unrecoverable configuration.");
        return;
    }
    int from = -1, to = -1, vol = -1;
    for (int i = 0; i < n; i++) {
        if (a[i] != mid) {
            if (a[i] < mid) {
                from = i+1;
                vol = mid - a[i];
            } else {
                to = i+1;
            }
        }
    }
    out.printf("%d ml. from cup #%d to cup #%d.\n", vol, from, to);
}