N = int(eval(input()))

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

dp = [10e9] * N

dp[0] = 0

dp[1] = abs(h[0] - h[1])





for i in range(2, N):

    if dp[i-1] + abs(h[i] - h[i-1]) < dp[i-2] + abs(h[i] - h[i-2]):

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

    else:

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





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

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

dp = [10e9] * N

dp[0] = 0

dp[1] = abs(h[0] - h[1])





for i in range(2, N):

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



print((dp[-1]))
N = int(eval(input()))
h = list(map(int, input().split()))
dp = [10e9] * N
dp[0] = 0
dp[1] = abs(h[0] - h[1])
for i in range(2, N):
    if dp[i - 1] + abs(h[i] - h[i - 1]) < dp[i - 2] + abs(h[i] - h[i - 2]):
        dp[i] = dp[i - 1] + abs(h[i] - h[i - 1])
    else:
        dp[i] = dp[i - 2] + abs(h[i] - h[i - 2])
print((dp[-1]))

N = int(eval(input()))
h = list(map(int, input().split()))
dp = [10e9] * N
dp[0] = 0
dp[1] = abs(h[0] - h[1])
for i in range(2, N):
    dp[i] = min(dp[i - 2] + abs(h[i] - h[i - 2]), dp[i - 1] + abs(h[i] - h[i - 1]))
print((dp[-1]))

-    if dp[i - 1] + abs(h[i] - h[i - 1]) < dp[i - 2] + abs(h[i] - h[i - 2]): -        dp[i] = dp[i - 1] + abs(h[i] - h[i - 1]) -    else: -        dp[i] = dp[i - 2] + abs(h[i] - h[i - 2]) +    dp[i] = min(dp[i - 2] + abs(h[i] - h[i - 2]), dp[i - 1] + abs(h[i] - h[i - 1]))