def twoArrays(k, A, B):
    B.sort()
    for num1 in A:
        working = False
        for num2 in B:
            if num1 + num2 >= k:
                working = True
                B.remove(num2)
                break
        if not working:
            return "NO"
    return "YES"

string twoArrays(int k, vector<int> A, vector<int> B) {
    sort(A.begin(), A.end());
    sort(B.begin(), B.end(), [](int l, int r){ return l > r;});
    for(int i = 0; i < A.size(); i++){
        if(A[i] + B[i] < k) return "NO";
    }
    return "YES";
}

def twoArrays(k, A, B):
    # Write your code here
    A.sort()
    B.sort(reverse=True)
    for (i,j) in zip(A,B):
        if ((i+j) < k):
            return "NO"
    return "YES"

string twoArrays(int k, vector<int> A, vector<int> B) {
    int c=0;
    for(int i=0;i<A.size();i++){
        if(A[i]/k>0){
            A[i] = k;
        }
        if(B[i]/k>0){
            B[i] = k;
        }
        int d = A[i]+B[i]+c;
        c = d - k;
    }
    if(c<0)return "NO";
    else return "YES";
}

def twoArrays(k, A, B):
    A.sort()
    B.sort(reverse=True)
    if any(a + b < k for (a, b) in zip(A, B)):
        return "NO"
    return "YES"