// Get the last element of set 'a' and the first element of set 'b' int startRange = a.get(a.size() - 1); Click Here int endRange = b.get(0);

// You can now iterate over the range from startRange to endRange for (int i = startRange; i <= endRange; i++) { // Check if 'i' is divisible by all elements of 'a' and is a factor of all elements of 'b' boolean divisibleByAllA = true; boolean factorOfAllB = true;

for (int num : a) {
    if (i % num != 0) {
        divisibleByAllA = false;
        break;
    }
}

for (int num : b) {
    if (num % i != 0) {
        factorOfAllB = false;
        break;
    }
}

if (divisibleByAllA && factorOfAllB) {
    // Your logic for valid integer within range
    System.out.println(i);
}

}