N = int(eval(input()))

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



INF = int(1e20)

dp = [INF] * (N)

dp[0] = 0





for i in range(N-1):

    if i == N-2:

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

    else:

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

        dp[i+2] = min(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

dp = [0] * N

dp[0] = 0

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



for i in range(2, N):

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

print((dp[N-1]))
N = int(eval(input()))
h = list(map(int, input().split()))
INF = int(1e20)
dp = [INF] * (N)
dp[0] = 0
for i in range(N - 1):
    if i == N - 2:
        dp[i + 1] = min(dp[i + 1], dp[i] + abs(h[i + 1] - h[i]))
    else:
        dp[i + 1] = min(dp[i + 1], dp[i] + abs(h[i + 1] - h[i]))
        dp[i + 2] = min(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
dp = [0] * N
dp[0] = 0
dp[1] = abs(h[1] - h[0])
for i in range(2, N):
    dp[i] = min(dp[i - 1] + abs(h[i] - h[i - 1]), dp[i - 2] + abs(h[i] - h[i - 2]))
print((dp[N - 1]))

-INF = int(1e20) -dp = [INF] * (N) +# DP +dp = [0] * N -for i in range(N - 1): -    if i == N - 2: -        dp[i + 1] = min(dp[i + 1], dp[i] + abs(h[i + 1] - h[i])) -    else: -        dp[i + 1] = min(dp[i + 1], dp[i] + abs(h[i + 1] - h[i])) -        dp[i + 2] = min(dp[i + 2], dp[i] + abs(h[i + 2] - h[i])) +dp[1] = abs(h[1] - h[0]) +for i in range(2, N): +    dp[i] = min(dp[i - 1] + abs(h[i] - h[i - 1]), dp[i - 2] + abs(h[i] - h[i - 2]))