n = int(eval(input()))

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



dp = [100000] * n



dp[0] = 0



for i in range(0, n):

    if i == 0:

        dp[i] = 0

    elif i == 1:

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

    else:

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

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

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



print((dp[-1]))

n = int(eval(input()))

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



dp = [100000] * n



dp[0] = 0



for i in range(0, n):

    if i == 0:

        dp[i] = 0

    elif i == 1:

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

    else:

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



print((dp[-1]))

n = int(eval(input()))
h = list(map(int, input().split()))
dp = [100000] * n
dp[0] = 0
for i in range(0, n):
    if i == 0:
        dp[i] = 0
    elif i == 1:
        dp[i] = abs(h[i - 1] - h[i])
    else:
        a = dp[i - 1] + abs(h[i] - h[i - 1])
        b = dp[i - 2] + abs(h[i] - h[i - 2])
        dp[i] = min(dp[i - 1] + abs(h[i] - h[i - 1]), dp[i - 2] + abs(h[i] - h[i - 2]))
print((dp[-1]))

n = int(eval(input()))
h = list(map(int, input().split()))
dp = [100000] * n
dp[0] = 0
for i in range(0, n):
    if i == 0:
        dp[i] = 0
    elif i == 1:
        dp[i] = abs(h[i - 1] - h[i])
    else:
        dp[i] = min(dp[i - 1] + abs(h[i] - h[i - 1]), dp[i - 2] + abs(h[i] - h[i - 2]))
print((dp[-1]))

-        a = dp[i - 1] + abs(h[i] - h[i - 1]) -        b = dp[i - 2] + abs(h[i] - h[i - 2])