def twoArrays(k, A, B):
    if sum(A)+sum(B)<k*len(A):
        return "NO"
    
    sort_A=sorted(A)
    sort_B=sorted(B,reverse=True)
    
    for i in range(len(A)):
        if sort_A[i]+sort_B[i]<k:
            return 'NO'
            
    return 'YES'