def twoArrays(k, A, B):
    # Write your code here
    for a in A:
        low = k-a
        bs = [b for b in B if b >=low]
        if bs: #if bs not empty
            B.remove(min(bs))
        else: # if bs empty
            return 'NO'
    return 'YES'

def twoArrays(k, A, B):
    # Write your code here
    A.sort()
    B.sort(reverse=True)
    comprobations = [x + y >= k for x,y in zip(A, B)]
    return "YES" if all(comprobations) else "NO"

n twoArrays(k: i32, A: &[i32], B: &[i32]) -> String {
    const YES: &str = "YES";
    const NO: &str = "NO";

    let mut sorted_a: Vec<i32> = A.to_vec();
    let mut sorted_b: Vec<i32> = B.to_vec();

    sorted_a.sort();
    sorted_b.sort();

    for (a_element, b_element) in sorted_a.iter().zip(sorted_b.iter().rev()) {
        if !(a_element + b_element >= k) {
            return NO.to_string();
        }
    }

    YES.to_string()
}

def twoArrays(k, A, B):
    A.sort()
    B.sort(reverse=True)
    
    for i in range(len(A)):
        if A[i] + B[i] < k:
            return "NO"
            
    return "YES"

def twoArrays(k, A, B):
    # Write your code here
    first = sorted(A)
    second = sorted(B,reverse= True)
    checkFalse = False
    for idx in range(len(first)):
        recordA = first[idx] 
        recordB = second[idx]
        sumRecord = recordA+recordB
        if sumRecord <k:
            checkFalse = True
            break
    if checkFalse:
        print("NO")
        return "NO"
    else: 
        print ("YES")
        return "YES"