qyliang/CodeNanoFix huggingface dataset:
Buggy code:
N = int(input())
li = list(map(int,input().split()))
if len(li) == 1:
    print(li[0])
    exit()
dp = [0,abs(li[1]-li[0])]
print(dp)
for i in range(2,N):
    dp.append(min(dp[i-1]+abs(li[i]-li[i-1]), dp[i-2]+abs(li[i]-li[i-2])))
print(dp[N-1])


Fixed code:
N = int(input())
li = list(map(int,input().split()))
if len(li) == 1:
    print(li[0])
    exit()
dp = [0,abs(li[1]-li[0])]
for i in range(2,N):
    dp.append(min(dp[i-1]+abs(li[i]-li[i-1]), dp[i-2]+abs(li[i]-li[i-2])))
print(dp[N-1])
Buggy code:
import sys
N=int(sys.stdin.readline())
H=list(map(int,sys.stdin.readline().split()))
dp[1]=abs(H[0]-H[1])
for i in range(2,N):
    dp[i]=min(dp[i-1]+abs(H[i-1]-H[i]),dp[i-2]+abs(H[i-2]-H[i]))
print(dp[-1])


Fixed code:
import sys
N=int(sys.stdin.readline())
H=list(map(int,sys.stdin.readline().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-1]-H[i]),dp[i-2]+abs(H[i-2]-H[i]))
print(dp[-1])
Buggy code:
n = int(input())
h = list(map(int, input().split()))

dp = [float("inf")] * n
dp[0] = 0
dp[1] = abs(h[2] - 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[n-1])

Fixed code:
n = int(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])
Buggy code:
n=int(input())
h=[int(i) for i in input().split()]

dp=[10000 for i in range(n+1)]
dp[0]=0
for i in range(n-1):
    dp[i+1]=min(dp[i+1],dp[i]+abs(h[i]-h[i+1]))
    dp[i+2]=min(dp[i+2],dp[i]+abs(h[i]-h[i+2]))
print(dp[n-1])

Fixed code:
n=int(input())
h=[int(i) for i in input().split()]

dp=[0 for i in range(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])
Buggy code:
n = int(input())

steps = [int(i) for i in input().split()]
dp = ['inf'] * n

dp[0:2] = steps[0], abs(steps[0] - steps[1])

for i in range(2, n):
    if dp[i-2] + abs(steps[i] - steps[i-2]) > dp[i-1] + abs(steps[i] - steps[i-1]):
        dp[i] = dp[i-1] + abs(steps[i] - steps[i-1])
    else:
        dp[i] = dp[i-2] + abs(steps[i] - steps[i-2])

print(dp[n-1])

Fixed code:
n = int(input())

steps = [int(i) for i in input().split()]
dp = ['inf'] * n

dp[0:2] = 0, abs(steps[0] - steps[1])

for i in range(2, n):
    if dp[i-2] + abs(steps[i] - steps[i-2]) >= dp[i-1] + abs(steps[i] - steps[i-1]):
        dp[i] = dp[i-1] + abs(steps[i] - steps[i-1])
    else:
        dp[i] = dp[i-2] + abs(steps[i] - steps[i-2])

print(dp[n-1])
Buggy code:
n=int(input())

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

inf=float('inf')
np=[inf]*n

np[0]=0

for i in range(n-1):
    if np[i+1]>abs(h[i]-h[i+1])+np[i] :
        np[i+1]=abs(h[i]-h[i+1])+np[i]
    if i < n-2:
        if np[i+2]>abs(h[i]-h[i+2])+np[i] :
            np[i+2]=abs(h[i]-h[i+2])+np[i]

print(int(np[n-1]))
print(np)


Fixed code:
n=int(input())

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

inf=float('inf')
np=[inf]*n

np[0]=0

for i in range(n-1):
    if np[i+1]>abs(h[i]-h[i+1])+np[i] :
        np[i+1]=abs(h[i]-h[i+1])+np[i]
    if i < n-2:
        if np[i+2]>abs(h[i]-h[i+2])+np[i] :
            np[i+2]=abs(h[i]-h[i+2])+np[i]

print(int(np[n-1]))
Buggy code:
N = int(input())
h = list(map(int, input().split()))
dp = [10000000000]*(N)
dp[0] = 0
for i in range(N-2):
    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[N-1] = min(dp[N-1], dp[N-2] + abs(h[N-1] - h[N-2]))
print(dp)


Fixed code:
N = int(input())
h = list(map(int, input().split()))
dp = [1000000001 for i in range(N+1)]
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])
Buggy code:
n=int(input())
h=list(map(int,input().split()))
dp=[10**6]*n
dp[0]=0
dp[1]=dp[0]+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))

Fixed code:
n = int(input())
h = list(map(int, input().split()))

dp = [10 ** 10] * n
dp[0] = 0

for i in range(n):
    if i + 1 < n:
        dp[i + 1] = min(dp[i + 1], dp[i] + abs(h[i + 1] - h[i]))

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

print(dp[n - 1])
Buggy code:
import sys
input = sys.stdio.readline

n = int(input())
h = tuple(map(int, input().split()))

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[-1])

Fixed code:
import sys
input = sys.stdin.readline

n = int(input())
h = tuple(map(int, input().split()))

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[-1])
Buggy code:
    n=int(input())
    h=list(map(int,input().split()))
    dp=[0]*(len(h))
    dp[1]+=abs(h[1]-h[0])
    for i in range(2,len(h)):
        dp[i] = min( 
                abs(h[i]-h[i-1])+dp[i-1],
                abs(h[i]-h[i-2])+dp[i-2]
                )
    print(dp[-1])


Fixed code:
n = int(input())
h = list(map(int, input().split()))

dp = [0 for _ in range(n)]
dp[0] = 0
dp[1] = abs(h[1] - h[0])

for i in range(2, n):
    dp[i] = min(
        dp[i-2] + abs(h[i-2] - h[i]),
        dp[i-1] + abs(h[i-1] - h[i]),
    )

print(dp[n-1])
Buggy code:
n = int(input)
h = tuple(map(int, input().split()))

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[-1])

Fixed code:
n = int(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-1]+abs(h[i]-h[i-1]), dp[i-2]+abs(h[i]-h[i-2]))
print(dp[n-1])
Buggy code:
n=int(input())
a=[int(x) for x in input().split()]
if n==2:
    print(abs(a[0]-a[1]))
else:
    l=[0]*(n)
    l[0]=a[0]
    l[1]=abs(a[0]-a[1])
    for i in range(2,n):
        l[i]=min(l[i-2]+abs(a[i-2]-a[i]),l[i-1]+abs(a[i-1]-a[i]))
    print(l[n-1])

Fixed code:
n=int(input())
a=[int(x) for x in input().split()]
if n==2:
    print(abs(a[0]-a[1]))
else:
    l=[0]*(n)
    l[0]=0
    l[1]=abs(a[0]-a[1])
    for i in range(2,n):
        l[i]=min(l[i-2]+abs(a[i-2]-a[i]),l[i-1]+abs(a[i-1]-a[i]))
    print(l[n-1])
Buggy code:
N = int(input())
h = list(map(int, input().split()))

INF = 10 ** 6
dp = [INF] * N

dp[0] = 0

for i in range(2, N):
    dp[i] = min(dp[i], dp[i-1] + abs(H[i] - H[i-1]))
    if i > 1:
        dp[i] = min(dp[i], dp[i-2] + abs(H[i] - H[i-2]))

print(dp[N-1])

Fixed code:
N = int(input())
H = list(map(int, input().split()))

INF = 10 ** 10
dp = [INF] * N

dp[0] = 0

for i in range(1, N):
    dp[i] = min(dp[i], dp[i-1] + abs(H[i] - H[i-1]))
    if i > 1:
        dp[i] = min(dp[i], dp[i-2] + abs(H[i] - H[i-2]))

print(dp[N-1])
Buggy code:
n = int(input())
h = list(map(int,input().split()))
dp = [int(1e+10) for _ in range(n)]
dp[0],dp[1] = 0,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[-1])

Fixed code:
n = int(input())
h = list(map(int,input().split()))
dp = [int(1e+10) for _ in range(n)]
dp[0],dp[1] = 0,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[-1])
Buggy code:
def edpcA(n, hs):
    hm2, hm1 = hs[0], hs[1]
    dp = [0, abs(hm2-hm1)]
    hs = list(reversed(hs[2:]))
    for i in range(2, n):
        h = hs.pop()
        d1 = dp[i-1] + abs(h-hm1)
        d2 = dp[i-2] + abs(h-hm2)
        dp.append(min(d1, d2))
        hm2, hm1 = hm1, h
    print(dp)
n = int(input())
hs = list(map(int, input().split(' ')))
edpcA(n, hs)

Fixed code:
def edpcA(n, hs):
    hm2, hm1 = hs[0], hs[1]
    dp = [0, abs(hm2-hm1)]
    hs = list(reversed(hs[2:]))
    for i in range(2, n):
        h = hs.pop()
        d1 = dp[i-1] + abs(h-hm1)
        d2 = dp[i-2] + abs(h-hm2)
        dp.append(min(d1, d2))
        hm2, hm1 = hm1, h
    print(dp[-1])
n = int(input())
hs = list(map(int, input().split(' ')))
edpcA(n, hs)
Buggy code:
N=int(input())
A = list(map(int, input().split()))
dp=[100000]*N
dp[0]=0
dp[1]=abs(A[1]-A[0])

for i in range(2,N):
    dp[i]=min(dp[i-1]+abs(A[i-1]-A[i]),dp[i-2]+abs(A[i-2]-A[i]))
print(dp)
print(dp[N-1])

Fixed code:
N=int(input())
A = list(map(int, input().split()))
dp=[100000]*N
dp[0]=0
dp[1]=abs(A[1]-A[0])

for i in range(2,N):
    dp[i]=min(dp[i-1]+abs(A[i-1]-A[i]),dp[i-2]+abs(A[i-2]-A[i]))
#print(dp)
print(dp[N-1])
Buggy code:
n=int(input())
h=[int(i) for i in input().split()]
db=[0]*n
db[1]=abs(h[0]-h[1])
for i in range(2,n):
    db[i]=min(db[i-2]+abs(h[i-2]-h[i]),db[i-1]+abs(h[i-1]+h[i]))
print(db[n-1])

Fixed code:
n=int(input())
h=[int(i) for i in input().split()]
dp=[0]*n
dp[1]=abs(h[0]-h[1])
for i in range(2,n):
    dp[i]=min(dp[i-2]+abs(h[i-2]-h[i]),dp[i-1]+abs(h[i-1]-h[i]))
print(dp[n-1])
Buggy code:


def solution(h):
    n = len(h)
    INF = float('inf')
    dp = [INF]*n
    dp[0] = 0
    for i in range(n):
        for j in range(i+1,i+3):
            if j < n:
                dp[j] = min(dp[j] , dp[i]+abs(h[i]-h[j]) )
    print(*dp)
    return dp[n-1]

N = int(input())
h = list(map(int,input().split()))
res = solution(h)
print(res,end="")


Fixed code:


def solution(h):
    n = len(h)
    INF = float('inf')
    dp = [INF]*n
    dp[0] = 0
    for i in range(n):
        for j in range(i+1,i+3):
            if j < n:
                dp[j] = min(dp[j] , dp[i]+abs(h[i]-h[j]) )
    
    return dp[n-1]

N = int(input())
h = list(map(int,input().split()))
res = solution(h)
print(res)
Buggy code:
N = int(input())
H = list(map(int, input().split()))
dp = [float('inf')] * N
dp[0] = 0
for i in range(1, N):
    dp[i] = min(dp[i-1] + abs(H[i]-H[i-1]), dp[i-2] + abs(H[i]-H[i-2])
                ) if i >= 2 else dp[i-1] + abs(H[i] - H[i-1])
print(*dp)
print(dp[N-1])


Fixed code:
N = int(input())
H = list(map(int, input().split()))
dp = [float('inf')] * N
dp[0] = 0
for i in range(1, N):
    dp[i] = min(dp[i-1] + abs(H[i]-H[i-1]), dp[i-2] + abs(H[i]-H[i-2])
                ) if i >= 2 else dp[i-1] + abs(H[i] - H[i-1])
#print(*dp)
print(dp[N-1])
Buggy code:
import sys
sys.setrecursionlimit(500000)

def get_cost(arr, n, dp):
  if dp[n] != 0:
    return dp[n]
  if n == 1:
    dp[1] = abs(arr[1] - arr[0])
    return dp[1]
  elif n == 0:
    dp[0] = 0
    return dp[0]
  else:
    dp[n] = min(
      abs(arr[n] - arr[n-1]) + get_cost(arr, n-1, dp),
      abs(arr[n] - arr[n-2]) + get_cost(arr, n-2, dp)
    )
    return dp[n]


N = int(input())
arr = [int(num) for num in input().split()]
dp_arr = [float("inf")]*N
print(get_cost(arr, N-1, dp_arr))


Fixed code:
import sys
sys.setrecursionlimit(500000)

def get_cost(arr, n, dp):
  if dp[n] != float('inf'):
    return dp[n]
  if n == 1:
    dp[1] = abs(arr[1] - arr[0])
    return dp[1]
  elif n == 0:
    dp[0] = 0
    return dp[0]
  else:
    dp[n] = min(
      abs(arr[n] - arr[n-1]) + get_cost(arr, n-1, dp),
      abs(arr[n] - arr[n-2]) + get_cost(arr, n-2, dp)
    )
    return dp[n]


N = int(input())
arr = [int(num) for num in input().split()]
dp_arr = [float('inf')]*N
print(get_cost(arr, N-1, dp_arr))
Buggy code:
## tasks https://atcoder.jp/contests/dp/tasks

def solution():
    # result array for calculation for optimal cost for every stone
    res = [None]*n
    res[0] = 0
    res[1] = abs(h[1]-h[0])
    for i in range(2, n):
        res[i] = min(res[i-1] + abs(h[i]-h[i-1]), res[i-2] + abs(h[i]-h[i-2]))

    return res[-1]

if __name__ == "__main__":
    n = int(raw_input())

    # global scope actually
    h = list(map(int, raw_input().split(" ")))
    #print("h = {}".format(h))

    print(solution())

Fixed code:
## tasks https://atcoder.jp/contests/dp/tasks

def solution():
    # result array for calculation for optimal cost for every stone
    res = [None]*n
    res[0] = 0
    res[1] = abs(h[1]-h[0])
    for i in range(2, n):
        res[i] = min(res[i-1] + abs(h[i]-h[i-1]), res[i-2] + abs(h[i]-h[i-2]))

    return res[-1]

if __name__ == "__main__":
    n = int(input())

    # global scope actually
    h = list(map(int, input().split(" ")))

    print(solution())
Buggy code:
from sys import stdin,stdout


n = int(stdin.readline())
dp = [0 for i in range(n)]
a  = list(map(int,stdin.readline().split()))
dp[1] = abs(a[1] - a[0])
if(n>1):
  for i in range(2,n):
  	dp[i] = min(dp[i-1] + abs(a[i]-a[i-1]) + dp[i-2] + abs(a[i]-a[i-2]))
print(dp[-1])


Fixed code:
from sys import stdin,stdout


n = int(stdin.readline())
dp = [0 for i in range(n)]
a  = list(map(int,stdin.readline().split()))
dp[1] = abs(a[1] - a[0])
if(n>1):
  for i in range(2,n):
  	dp[i] = min(dp[i-1] + abs(a[i]-a[i-1]) , dp[i-2] + abs(a[i]-a[i-2]))
print(dp[-1])
Buggy code:
N = int(input())
h = [int(x) for x in input().split()]
dp = [0]*N

for i in range(1,N):
  	if i==1:
      	dp[i] = abs(h[1]-h[0])
    elif i>1:
      	dp[i] = min(abs(h[i]-h[i-1])+dp[i-1],abs(h[i]-h[i-2])+dp[i-2])
    
print(dp[N-1])

Fixed code:
N = int(input())
h = [int(x) for x in input().split()]
dp = [0]*N

for i in range(1,N):
    if i==1:
        dp[i] = abs(h[1]-h[0])
    elif i>1:
        dp[i] = min(abs(h[i]-h[i-1])+dp[i-1],abs(h[i]-h[i-2])+dp[i-2])

print(dp[N-1])
Buggy code:
n = int(input())
hL = list(map(int, input().split()))

dp = [10**10] * (n+1)
dp[0] = 0
dp[1] = hL[0]
dp[2] = min(abs(hL[1]-hL[0]), hL[1])
for i in range(3,n+1):
    dp[i] = min(dp[i-1]+abs(hL[i-1]-hL[i-2]), dp[i-2]+abs(hL[i-1]-hL[i-3]))
print(dp[n])


Fixed code:
n=int(input())
h=[0]+list(map(int,input().split()))
dp=[0]*(n+1)
dp[2]=abs(h[2]-h[1])
for i in range(3,n+1):
    dp[i]=min(dp[i-2]+abs(h[i]-h[i-2]),dp[i-1]+abs(h[i]-h[i-1]))
print(dp[n])
Buggy code:
N = int(input())
H = [int(i) for i in input().split()]

dp = [0]*N

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])

Fixed code:
N = int(input())
H = [int(i) for i in input().split()]

dp = [0]*N
dp[1] = abs(H[0] - H[1])

if N == 2:
    print(dp[-1])

else:
    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])
Buggy code:
n=int(input())
a=list(map(int,input().split()))

dp=[-1]*n
dp[0]=0
dp[1]=abs(a[0]-a[1])

for i in range(2,n):
    dp[i]=min(abs(a[i]-a[i-2]),abs(a[i]-a[i-1])+abs(a[i-2]-a[i-1]))
print(dp[-1])

Fixed code:
n=int(input())
a=list(map(int,input().split()))

dp=[-1]*n
dp[0]=0
dp[1]=abs(a[0]-a[1])

for i in range(2,n):
    dp[i]=min(
        dp[i-2]+abs(a[i]-a[i-2]),
        dp[i-1]+abs(a[i]-a[i-1])
    )
    
print(dp[-1])
Buggy code:
N = int(input())
H = list(map(int, input().split()))

cost = [0]*N
for n in range(1, N):
    if n == 1:
        cost[n] = cost[n-1]+abs(H[n-1]-H[n])
    else:
        cost[n] = min(cost[n-1]+abs(H[n-1]-H[n]), cost[n-2]+abs(H[n-2]-H[n]))
print(cost)
print(cost[N-1])


Fixed code:
N = int(input())
H = list(map(int, input().split()))

cost = [0]*N
for n in range(1, N):
    if n == 1:
        cost[n] = cost[n-1]+abs(H[n-1]-H[n])
    else:
        cost[n] = min(cost[n-1]+abs(H[n-1]-H[n]), cost[n-2]+abs(H[n-2]-H[n]))
print(cost[N-1])
Buggy code:
'''input
4
10 30 40 20
'''

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

Fixed code:
'''input
4
10 30 40 20
'''

n=int(input())
arr=list(map(int,input().split()))
dp=[0]*len(arr)
for i in range(1,n):
	dp[i]=dp[i-1]+abs(arr[i]-arr[i-1])
	if(i>1):
		a=dp[i-2]+abs(arr[i]-arr[i-2])
		dp[i]=min(dp[i],a)
print(dp[n-1])
Buggy code:
N = int(input())
h = list(map(int,input().split()))

dp = [float('inf')]*N

dp[0] = 0
dp[1] = 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])

Fixed code:
N=int(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-2]+abs(h[i]-h[i-2])),dp[i-1]+abs(h[i]-h[i-1]))
print(dp[N-1])
Buggy code:
n = int(input())
li = list(map(int,input().split()))

dp = [10**8] * n

for i in range(n):
    if i == 0:
        dp[i] = 0
    elif i == 1:
        dp[i] = abs(li[i] - li[i-1])
    else:
        dp[i] = min(abs(li[i] - li[i-1]) + dp[i], abs(li[i] - li[i-2]) + dp[i-2])

print(dp[-1])


Fixed code:
n = int(input())
li = list(map(int,input().split()))

dp = [10**8] * n

for i in range(n):
    if i == 0:
        dp[i] = 0
    elif i == 1:
        dp[i] = abs(li[i] - li[i-1])
    else:
        dp[i] = min(abs(li[i] - li[i-1]) + dp[i-1], abs(li[i] - li[i-2]) + dp[i-2])

print(dp[-1])
Buggy code:
N = int(input())
h = [int(_) for _ in input().split()]
dp = [float('inf')]*(N)
dp[0] = 0

for i in range(N-2):
    dp[i+1] = min(dp[i+1], dp[i]+abs(h[i]-h[i+1]))
    dp[i+2] = min(dp[i+2], dp[i]+abs(h[i]-h[i+2]))

print(dp[N-1])

Fixed code:
N = int(input())
h = [int(_) for _ in input().split()]
dp = [0]*(N)
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])
Buggy code:
N = int(input())
h = list(map(int, input().split())) #0-index

inf = float('inf')
dp = [inf]*(N+1)

def chmin(a,b):
    if a >= b:
        return b
    else:
        a

dp[0] = 0
for i in range(1,N):
    dp[i] = chmin(dp[i], dp[i-1] + abs(h[i] - h[i-1]))
    
    if i >= 2:
        dp[i] = chmin(dp[i], dp[i-2] + abs(h[i] - h[i-2]))
    
print(dp[N-1])

Fixed code:
N = int(input())
h = list(map(int, input().split())) #1-index

dp = [float('inf')]*(N)

def chmin(a,b):
    if a >= b:
        return b
    else:
        return a

dp[0] = 0
for i in range(1,N):
    dp[i] = chmin(dp[i], dp[i-1] + abs(h[i] - h[i-1]))
    
    if i >= 2:
        dp[i] = chmin(dp[i], dp[i-2] + abs(h[i] - h[i-2]))
    
print(dp[N-1])
Buggy code:
n = int(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-2]+abs(h[i-2]-h[i]), dp[i-1]+abs(h[i-1]-h[i]))
print(dp[-1])

Fixed code:
n=int(input())
h=[int(i) for i in 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])
Buggy code:
class struct:
  def __init__(self,a,b):
    self.a=a
    self.b=b

n=int(input())
l=list(map(int,input().split()))

l2=[struct(0,0) for _ in 3]
l2[0].a=l[0]
l2[1].a=l[1]
l2[1].b=abs(l[0]-l[1])

for x in l[2:]:
  l[0]=l[1]
  l[1]=l[2]
  l2[2].a=x
  l2[2].b=min(abs(l2[0].a-x)+l2[0].b,
    abs(l2[1].a-x)+l2[1].b)

print(l2[2].b)

Fixed code:
class struct:
  def __init__(self,a,b):
    self.a=a
    self.b=b

n=int(input())
l=list(map(int,input().split()))

l2=[struct(0,0) for _ in range(n)]
l2[0].a=l[0]
l2[1].a=l[1]
l2[1].b=abs(l[0]-l[1])

i=2
for x in l[2:]:
  l2[i].a=x
  l2[i].b=min(abs(l2[i-2].a-x)+l2[i-2].b,
    abs(l2[i-1].a-x)+l2[i-1].b)
  i+=1

print(l2[-1].b)
Buggy code:
N=int(input())
h=list(map(int,input().split()))
DP=[0]*N
DP[0]=0
DP[1]=abs(h[0]-h[1])
for i in raange(1,N-1):
  DP[i+1]=min(DP[i]+abs(h[i]-h[i+1]),DP[i-1]+abs(h[i-1]-h[i+1]))
print(DP[N-1])
  

Fixed code:
N=int(input())
h=list(map(int,input().split()))
DP=[0]*N
DP[0]=0
DP[1]=abs(h[0]-h[1])
for i in range(1,N-1):
  DP[i+1]=min(DP[i]+abs(h[i]-h[i+1]),DP[i-1]+abs(h[i-1]-h[i+1]))
print(DP[N-1])
Buggy code:
n = int(input())
h = list(map(int, input().split()))

dp = [float('inf')]*n

dp[0] = 0

for i in range(1,n):
  dp[i] = min(dp[i-1]+abs(h[i]-h[i-1]), dp[i-1]+abs(h[i]-h[i-2]))

print(dp[n-1])

Fixed code:
n = int(input())
h = list(map(int, input().split()))

dp = [float('inf')]*n

dp[0] = 0
dp[1] = dp[0]+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])
Buggy code:
n = int(input())
s = input().split()
for i in range(n):
  s[i] = int(s[i])
memo = [0 for i in range(n+1)]
memo[0] = 0
memo[1] = 0
for i in range(2,n+1):
  memo[i] = min(memo[i-1]+abs(s[i]-s[i-1]), memo[i-2]+abs(s[i]-s[i-2]))
print(memo[n])

Fixed code:
n = int(input())
s = input().split()
for i in range(n):
  s[i] = int(s[i])
memo = [0 for i in range(n)]
memo[0] = 0
for i in range(1,n):
  if i==1:
      memo[i] = memo[i-1]+abs(s[i]-s[i-1])
  else:
      memo[i] = min(memo[i-1]+abs(s[i]-s[i-1]), memo[i-2]+abs(s[i]-s[i-2]))
print(memo[n-1])
Buggy code:
def frog1(a,n):
  dp=[0]*(n)
  dp[0]=0
  dp[1]=abs(a[1],a[0])
  for i in range(2,n):
    dp[i]=min(dp[i-2]+abs(a[i]-a[i-2]),dp[i-1]+abs(a[i]-a[i-1]))
  return dp[-1]

def main():
  n=int(input())
  a=list(map(int,input().split()))
  print(frog1(a,n))
 
if __name__ == '__main__':
    main()

Fixed code:
def frog1(a,n):
  dp=[0]*(n)
  dp[0]=0
  dp[1]=abs(a[1]-a[0])
  for i in range(2,n):
    dp[i]=min(dp[i-2]+abs(a[i]-a[i-2]),dp[i-1]+abs(a[i]-a[i-1]))
  return dp[-1]
 
def main():
  n=int(input())
  a=list(map(int,input().split()))
  print(frog1(a,n))
 
if __name__ == '__main__':
    main()
Buggy code:
from sys import stdin
import sys
import math
from functools import reduce
import functools
import itertools
from collections import deque,Counter
from operator import mul
import copy
# ! /usr/bin/env python
# -*- coding: utf-8 -*-
import heapq

n = int(input())
h = [0] + list(map(int, input().split()))

INF = 10**15

dp = [INF]*(n+5)
dp[0] = 0
dp[1] = 0

for i in range(1,n-1):
    a = dp[i] + abs(h[i+1]-h[i])
    dp[i+1] = min(dp[i+1], a)
    a = dp[i] + abs(h[i + 2] - h[i])
    dp[i+2] = min(dp[i+2], a)

print(dp[n])


Fixed code:
from sys import stdin
import sys
import math
from functools import reduce
import functools
import itertools
from collections import deque,Counter
from operator import mul
import copy
# ! /usr/bin/env python
# -*- coding: utf-8 -*-
import heapq

n = int(input())
h = [0] + list(map(int, input().split()))

INF = 10**15

dp = [INF]*(n+5)
dp[0] = 0
dp[1] = 0
dp[2] = abs(h[2]-h[1])

for i in range(3,n+1):
    dp[i] = min([dp[i-2] + abs(h[i] - h[i-2]),dp[i-1] + abs(h[i] - h[i-1]) ])

print(dp[n])
Buggy code:
N = int(input())
h = list(map(int, input().split()))
dp = [0]*N+1
    
for i in range(1,N):
    if i == 1:
        dp[1] = abs(h[1]-h[0])
    else:
        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])

Fixed code:
N = int(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-1] + abs(h[i]-h[i-1]),dp[i-2] + abs(h[i]-h[i-2]))
answer = dp[-1]
print(answer)
Buggy code:
n = int(input())
h = list(map(int, input().split()))

dp = [0] * (n + 10)
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])


Fixed code:
n = int(input())
c = list(map(int, input().split()))
dp = [0] * n

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

for i in range(2, n):
    dp[i] = min(dp[i - 1] + abs(c[i] - c[i - 1]), dp[i - 2] + abs(c[i] - c[i - 2]))

print(dp[n-1])
Buggy code:
n = int(input())

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


dp=[float('inf')]*n
dp[0]=0


for i in range(n):
     for j in range(i+1,n):
          dp[j] = min(dp[j],dp[i] + abs(h[i]-h[j]))
print(dp[-1])
     


Fixed code:
n = int(input())
h = list(map(int, input().split())) + [0]*2
dp = [0] + [float("inf")] * (n+1)

for i in range(n):
    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])
Buggy code:
N = int(input())
A = list(map(int, input().split()))
dp = [0, abs(A[1] - A[0])]
for i in range(2, N):
  dp[i] = min(
    abs(A[i] - A[i - 1]) + dp[i - 1],
    abs(A[i] - A[i - 2]) + dp[i - 2])
print(dp[-1])


Fixed code:
N = int(input())
A = list(map(int, input().split()))
dp = [0] * N
dp[1] = abs(A[1] - A[0])
for i in range(2, N):
  dp[i] = min(
    abs(A[i] - A[i - 1]) + dp[i - 1],
    abs(A[i] - A[i - 2]) + dp[i - 2])
print(dp[-1])
Buggy code:
n=int(input())
f=[0]*n
a=list(map(int,input().split()))
f[0]=0
f[1]=abs(a[0]-a[1])
for i in range(2,n):
    a1=abs(a[i]-a[i-2])
    b=abs(a[i]-a[i-1])
    f[i]=min((f[i-2]+a1),(f[i-1]+b))
    
print(f)
print(f[n-1])

Fixed code:
n=int(input())
f=[0]*n
a=list(map(int,input().split()))
f[0]=0
f[1]=abs(a[0]-a[1])
for i in range(2,n):
    a1=abs(a[i]-a[i-2])
    b=abs(a[i]-a[i-1])
    f[i]=min((f[i-2]+a1),(f[i-1]+b))
print(f[n-1])