n, a, b = map(int, input().split())
l = list(map(int, input().split()))
s = 0
for i in range(n - 1):
    s += min((l[i + 1] - l[i]) * a, b)
print(s)

bae124f6d5f66eea33e5e0bc18412b2c6fa7da60
<mask token>

<mask token>
for i in range(n - 1):
    s += min((l[i + 1] - l[i]) * a, b)
print(s)

n, a, b = map(int, input().split())
l = list(map(int, input().split()))
s = 0
for i in range(n - 1):
    s += min((l[i + 1] - l[i]) * a, b)
print(s)
