N = int(eval(input()))

h = [int(i) for i in input().split()]



dp = [0]*N

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



for i in range(N-2):

  dp[i+2]=min(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()))



dp = [0]*n

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



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[-1]))
N = int(eval(input()))
h = [int(i) for i in input().split()]
dp = [0] * N
dp[1] = abs(h[1] - h[0])
for i in range(N - 2):
    dp[i + 2] = min(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()))
dp = [0] * n
dp[1] = abs(h[0] - h[1])
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[-1]))

-N = int(eval(input())) -h = [int(i) for i in input().split()] -dp = [0] * N -dp[1] = abs(h[1] - h[0]) -for i in range(N - 2): -    dp[i + 2] = min(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())) +dp = [0] * n +dp[1] = abs(h[0] - h[1]) +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[-1]))