def solve(n, x, y, a, b):
    ans = 0
    for i in range(n):
        ans += max(a[i] + a[n + i] + x, a[i] + b[n + i] + y, b[i] + a[n + i] + y, b[i] + b[n + i] + x)
    return ans

n, x, y = map(int,input().split())
a = list(map(int,input().split()))
b = list(map(int,input().split()))

print(solve(n, x, y, a, b))