pub fn permuting_two_arrays(k: i32, A: &[i32], B: &[i32]) -> String {
    //Time complexity: O(n*log(n))
    //Space complexity (ignoring input): O(n)
    let mut A = A.to_vec();
    A.sort_unstable();
    let mut B = B.to_vec();
    B.sort_unstable_by(|x, y| y.cmp(x));
    for (index, a_value) in A.iter().enumerate() {
        let b_value = B[index];
        if a_value + b_value < k {
            return "NO".to_string();
        }
    }

    "YES".to_string()
}