N = int(eval(input()))

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



dp = [0] * N

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

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

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



dp = [10**9] * 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()))
dp = [0] * N
dp[1] = abs(h[1] - h[0])
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[N - 1]))

N = int(eval(input()))
h = list(map(int, input().split()))
dp = [10**9] * 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]))

-dp = [0] * N +dp = [10**9] * N +dp[0] = 0 -    dp[i] = min([dp[i - 2] + abs(h[i] - h[i - 2]), dp[i - 1] + abs(h[i] - h[i - 1])]) +    dp[i] = min(dp[i - 1] + abs(h[i] - h[i - 1]), dp[i - 2] + abs(h[i] - h[i - 2]))