n = int(eval(input()))

h = list(map(int, input().split()))

def chmin(a, b):

    if a > b:

        return b

    else:

        return a



dp = [float('inf')] * n

dp[0] = 0

for i in range(0, n - 1):

    dp[i + 1] = chmin(dp[i + 1], dp[i] + abs(h[i + 1] - h[i]))

    if i < n - 2:

        dp[i + 2] = chmin(dp[i + 2], dp[i] + abs(h[i + 2] - h[i]))



print((dp[n - 1]))
n = int(eval(input()))

h = list(map(int, input().split()))

dp = [float('inf')] * (n + 10)

dp[0] = 0

def chmin(a, b):

    if a < b:

        return a

    else:

        return b



for i in range(n):

    if i == 0:

        dp[i + 1] = dp[i] + abs(h[i + 1] - h[i])

    if i < n - 2:

        dp[i + 2] = chmin(dp[i + 1] + abs(h[i + 2] - h[i + 1]), dp[i] + abs(h[i + 2] - h[i]))



print((dp[n - 1]))
n = int(eval(input()))
h = list(map(int, input().split()))


def chmin(a, b):
    if a > b:
        return b
    else:
        return a


dp = [float("inf")] * n
dp[0] = 0
for i in range(0, n - 1):
    dp[i + 1] = chmin(dp[i + 1], dp[i] + abs(h[i + 1] - h[i]))
    if i < n - 2:
        dp[i + 2] = chmin(dp[i + 2], dp[i] + abs(h[i + 2] - h[i]))
print((dp[n - 1]))

n = int(eval(input()))
h = list(map(int, input().split()))
dp = [float("inf")] * (n + 10)
dp[0] = 0


def chmin(a, b):
    if a < b:
        return a
    else:
        return b


for i in range(n):
    if i == 0:
        dp[i + 1] = dp[i] + abs(h[i + 1] - h[i])
    if i < n - 2:
        dp[i + 2] = chmin(
            dp[i + 1] + abs(h[i + 2] - h[i + 1]), dp[i] + abs(h[i + 2] - h[i])
        )
print((dp[n - 1]))

+dp = [float("inf")] * (n + 10) +dp[0] = 0 -    if a > b: +    if a < b: +        return a +    else: -    else: -        return a -dp = [float("inf")] * n -dp[0] = 0 -for i in range(0, n - 1): -    dp[i + 1] = chmin(dp[i + 1], dp[i] + abs(h[i + 1] - h[i])) +for i in range(n): +    if i == 0: +        dp[i + 1] = dp[i] + abs(h[i + 1] - h[i]) -        dp[i + 2] = chmin(dp[i + 2], dp[i] + abs(h[i + 2] - h[i])) +        dp[i + 2] = chmin( +            dp[i + 1] + abs(h[i + 2] - h[i + 1]), dp[i] + abs(h[i + 2] - h[i]) +        )