qyliang/CodeNanoFix huggingface dataset:
Buggy code:
from sys import stdin


def solve():
    n = int(input())
    A = [int(i) for i in stdin.readline().split()]
    if n == 2: return abs(A[0] - A[1])
    curr = 0
    p2, p1 = A[0], abs(A[0] - A[1])
    for i in range(2, len(A)):
        # print(p2, p1)
        curr += min(abs(A[i] - A[i-1]), abs(A[i] - A[i-2]))
        p2 = p1
        p1 = curr
    return curr

print(solve())

Fixed code:
from sys import stdin


def solve():
    n = int(input())
    A = [int(i) for i in stdin.readline().split()]
    if n == 2: return abs(A[0] - A[1])
    curr = 0
    p2, p1 = 0, abs(A[0] - A[1])
    for i in range(2, len(A)):
        # print(p2, p1)
        # curr = min(abs(A[i] - A[i-1]), abs(A[i] - A[i-2]))
        prev2 = abs(A[i] - A[i-2]) + p2
        prev = abs(A[i] - A[i-1]) + p1
        if prev > prev2: curr = prev2
        else: curr = prev
        p2 = p1
        p1 = curr
    return curr

print(solve())
Buggy code:
N=int(input())
li=list(map(int,input().split()))
kekka=[0]*N
#print(li)
#print(kekka)
for i in range(1,N):
    if i==1:
        kekka[i]=li[i]-li[i-1]
    else:
        a=abs(li[i]-li[i-1])+kekka[i-1]
        b=abs(li[i]-li[i-2])+kekka[i-2]
        kekka[i]=min(a,b)
print(kekka[-1])

Fixed code:
N=int(input())
li=list(map(int,input().split()))
kekka=[0]*N
#print(li)
#print(kekka)
for i in range(1,N):
    if i==1:
        kekka[i]=abs(li[i]-li[i-1])
    else:
        a=abs(li[i]-li[i-1])+kekka[i-1]
        b=abs(li[i]-li[i-2])+kekka[i-2]
        kekka[i]=min(a,b)
print(kekka[-1])
Buggy code:
N = int(input())
h = list(map(int, input().split()))
dp = [float("inf") for _ in range(N)]
dp[0] = 0
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])


Fixed code:
N = int(input())
h = list(map(int, input().split()))
dp = [float("inf") for _ in range(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:
def sol(lis):
    if len(lis)<=2:
        return abs(lis[0]-lis[1])
    costs = [0,abs(lis[0]-lis[1])]
    for i in range(2,len(lis)):
        x = abs(lis[i]-lis[i-1])
        y = abs(lis[i]-lis[i-2])
        costs.append(min(x+costs[-1]),min(x+costs[-2]))
    print(costs)
    return costs[-1]
input()
lis = list(map(int,input().split(' ')))
print(sol(lis))

Fixed code:
def sol(lis):
    if len(lis)<=2:
        return abs(lis[0]-lis[1])
    costs = [0,abs(lis[0]-lis[1])]
    for i in range(2,len(lis)):
        x = abs(lis[i]-lis[i-1])
        y = abs(lis[i]-lis[i-2])
        costs.append(min(x+costs[-1],y+costs[-2]))
    return costs[-1]
input()
lis = list(map(int,input().split(' ')))
print(sol(lis))
Buggy code:
import sys
import functools
import threading

sys.setrecursionlimit(10000000)


def main():
    N = int(input())
    H = [-1] + [int(x) for x in input().split(" ")]
    table = [-1 for i in range(N + 1)]

    @functools.lru_cache(maxsize=None)
    def solve(n):

        if n == 1:
            return 1
        elif n == 2:
            return abs(H[2] - H[1])
        else:
            return min(
                solve(n - 1) + abs(H[n] - H[n - 1]), solve(n - 2) + abs(H[n] - H[n - 2])
            )

    print(solve(N))


if __name__ == "__main__":

    sys.setrecursionlimit(1024 * 1024)
    threading.stack_size(128 * 1024 * 1024)
    threading.Thread(target=main).start()


Fixed code:
import sys
import functools
import threading

sys.setrecursionlimit(10000000)


def main():
    N = int(input())
    H = [-1] + [int(x) for x in input().split(" ")]
    table = [-1 for i in range(N + 1)]

    @functools.lru_cache(maxsize=None)
    def solve(n):

        if n == 1:
            return 0
        elif n == 2:
            return abs(H[2] - H[1])
        else:
            return min(
                solve(n - 1) + abs(H[n] - H[n - 1]), solve(n - 2) + abs(H[n] - H[n - 2])
            )

    print(solve(N))


if __name__ == "__main__":

    sys.setrecursionlimit(1024 * 1024)
    threading.stack_size(128 * 1024 * 1024)
    threading.Thread(target=main).start()
Buggy code:
def solve(n):
    table = [-1 for i in range(N + 1)]
    for i in range(1, n + 1):
        if i == 1:
            table[1] = 1
        elif i == 2:
            table[2] = abs(H[2] - H[1])
        else:
            table[i] = min(
                table[i - 1] + abs(H[i] - H[i - 1]), table[i - 2] + abs(H[i] - H[i - 2])
            )
    return table[n]


if __name__ == "__main__":
    N = int(input())
    H = [-1] + [int(x) for x in input().split(" ")]

    print(solve(N))


Fixed code:
def solve(n):
    table = [0 for i in range(N + 1)]
    for i in range(1, n + 1):
        if i == 1:
            table[1] = 0
        elif i == 2:
            table[2] = abs(H[2] - H[1])
        else:
            table[i] = min(
                table[i - 1] + abs(H[i] - H[i - 1]), table[i - 2] + abs(H[i] - H[i - 2])
            )
    return table[n]


if __name__ == "__main__":
    N = int(input())
    H = [0] + [int(x) for x in input().split(" ")]

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


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(abs(h[i-1]-h[i])+dp[i-1],abs(h[i-2]-h[i])+dp[i-2])
print(dp[-1])
Buggy code:
inf = float('inf')
def main():
    n, k = map(int, input().rstrip().split())
    h = list(map(int, input().rstrip().split()))
    dp = [inf for i in range(n)]
    dp[0] = 0
    for i in range(n):
        for j in range(i+1, i+k+1):
            if j<n:
                cost = abs(h[i] - h[j])
                dp[j] = min(dp[j], dp[i] + cost)
    print(dp[n-1])

if __name__ == "__main__":
    main()


Fixed code:
inf = float('inf')
def main():
    n = int(input().rstrip())
    h = list(map(int, input().rstrip().split()))
    dp = [inf for i in range(n)]
    dp[0]=0
    for i in range(n):
        for j in [i+1, i+2]:
            if j<n:
                dp[j] = min(dp[j], dp[i]+ abs(h[i] - h[j]))
    print(dp[n-1])

if __name__ == "__main__":
    main()
Buggy code:
N = int(input())
steps = list(map(int, input().split(" ")))

costs = [None] * N
costs[0] = 0
costs[1] = abs(steps[1] - steps[0])
costs[2] = min(abs(steps[2] - steps[0]), costs[1] + abs(steps[2] - steps[1]))

for i in range(3, N):
    cost1 = costs[i-1] + abs(steps[i-1] - steps[i])
    cost2 = costs[i-2] + abs(steps[i-2] - steps[i])
    costs[i] = min(cost1, cost2)

print(costs[N-1])

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

costs = [None] * N
costs[0] = 0
costs[1] = abs(steps[1] - steps[0])
if N > 2:
    costs[2] = min(abs(steps[2] - steps[0]), costs[1] + abs(steps[2] - steps[1]))

for i in range(3, N):
    cost1 = costs[i-1] + abs(steps[i-1] - steps[i])
    cost2 = costs[i-2] + abs(steps[i-2] - steps[i])
    costs[i] = min(cost1, cost2)

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

Fixed code:
n=int(input())
h=list(map(int,input().split()))
min_cost=[0]*n
min_cost[0]=0
min_cost[1]=abs(h[1]-h[0])
for i in range(2,n):
    min_cost[i]=min(min_cost[i-1]+abs(h[i]-h[i-1]),min_cost[i-2]+abs(h[i]-h[i-2]))
print(min_cost[-1])
Buggy code:
import numpy as np
n = int(input())

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

dp = [0] * n
dp[1] = np.abs(h_list[1] - h_list[0])
print(dp)
for ashiba_index in range(2, n):
    dp[ashiba_index] = min(dp[ashiba_index-1]+np.abs(h_list[ashiba_index] - h_list[ashiba_index-1]),
                           dp[ashiba_index-2] + np.abs(h_list[ashiba_index]-h_list[ashiba_index-2]))
print(dp[n-1])

Fixed code:
import numpy as np
n = int(input())

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

dp = [0] * n
dp[1] = np.abs(h_list[1] - h_list[0])
for ashiba_index in range(2, n):
    dp[ashiba_index] = min(dp[ashiba_index-1]+np.abs(h_list[ashiba_index] - h_list[ashiba_index-1]),
                           dp[ashiba_index-2] + np.abs(h_list[ashiba_index]-h_list[ashiba_index-2]))
print(dp[n-1])
Buggy code:
N=int(input())
K=1
h=[int(i) for i in input().split()]
dp=[float("inf")]*N
dp[0]=0
for i in range(N):
  for k in range(1,K+1):
    if i+k>=N:
      break
    dp[i+k]=min(dp[i+k],dp[i]+abs(h[i]-h[i+k]))
print(dp[N-1])
    


Fixed code:
N=int(input())
K=2
h=[int(i) for i in input().split()]
dp=[float("inf")]*N
dp[0]=0
for i in range(N):
  for k in range(1,K+1):
    if i+k>=N:
      break
    dp[i+k]=min(dp[i+k],dp[i]+abs(h[i]-h[i+k]))
print(dp[N-1])
Buggy code:
def main():
  n = int(input())
  hs = tuple(map(int, input().split()))

  a, b = 0, abs(hs[1] - hs[0])

  for i in range(2, n):
    d1 = a + abs(hs[i] - hs[i-2])
    d2 = b + abs(hs[i] - hs[i-1])
    a, b = b, d1 if d1 <= d2 else d2

  print(b)

Fixed code:
def main():
  n = int(input())
  hs = tuple(map(int, input().split()))

  a, b = 0, abs(hs[1] - hs[0])

  for i in range(2, n):
    d1 = a + abs(hs[i] - hs[i-2])
    d2 = b + abs(hs[i] - hs[i-1])
    a, b = b, d1 if d1 <= d2 else d2

  print(b)

if __name__ == "__main__":
  main()
Buggy code:
n = int(input())
hs = list(map(int, input().split()))

a, b = 0, abs(hs[1] - hs[0])

for i in range(2, n):
  d1 = a + abs(hs[i] - hs[i-2])
  d2 = b + abs(hs[i] - hs[i-1])
  a, b = b, min(d1, d2)
  a, b = b, d1 if d1 <= d2 else d2

print(b)

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

a, b = 0, abs(hs[1] - hs[0])

for i in range(2, n):
  d1 = a + abs(hs[i] - hs[i-2])
  d2 = b + abs(hs[i] - hs[i-1])
  a, b = b, min(d1, d2)

print(b)
Buggy code:
N = int(input())
C = list(map(int,input().split()))

dp = [-1 for _ in range(N)]

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

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

print(dp[N-1]) 


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

dp = [-1 for _ in range(N)]

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

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

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

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

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

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

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

dp=[0]*n

ans=0

if n==2:
  ans=abs(h[0]-h[1])
else:
  dp[0]=0
  dp[1]=abs(h[1]-h[0])

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

print(ans)
Buggy code:
n=int(input())
l=list(map(int,input().split()))
dp=[float('inf') for i in range(n+1)]
dp[0]=0
for i in range(len(dp)):
	for j in range(i+1,i+3):
    	if(j<len(l)):
      		dp[j]=min(dp[j],dp[i]+abs(l[j]-l[i]))
print(dp[n])


Fixed code:
n=int(input())
l=list(map(int,input().split()))
dp=[float('inf') for i in range(n+1)]
dp[0]=0
for i in range(len(dp)):
    for j in range(i+1,i+3):
        if(j<len(l)):
      	    dp[j]=min(dp[j],dp[i]+abs(l[j]-l[i]))
print(dp[n-1])
Buggy code:
n = int(input())
h = [int(i) for i in input().split()]

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


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

dp = [0,abs(h[1]-h[0])]
for i in range(2,n):
    dp.append(min(dp[-2] + abs(h[i] - h[i-2]),dp[-1] + abs(h[i] - h[i-1])))
print(dp[n-1])
Buggy code:
N = int(input())
h = list(map(int,input().split()))
cost = [1000000]*N
cost[0] = 0
cost[1] = abs(h([1]-h[0])
for i in range(2, N):
  cost[i] = min((abs(h[i-1] - h[i]) + cost[i-1]),cost[i])
  cost[i] = min((abs(h[i-2] - h[i]) + cost[i-2]), cost[i])
print(cost[-1])

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

cost = [0]*(n)
cost[1] = abs(h[0]-h[1])

for i in range(2,n):
  cost[i] = min(cost[i-2]+abs(h[i]-h[i-2]),cost[i-1]+abs(h[i]-h[i-1]))
  
print(cost[-1])
Buggy code:
n=int(input())
h=list(map(int,input().split()))
dp=[10**5]*n
for i in range(n):
  if i==0:
    dp[i]=0
  elif i==1:
    dp[i]=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)

Fixed code:
n=int(input())
h=list(map(int,input().split()))
dp=[10**5]*n
for i in range(n):
  if i==0:
    dp[i]=0
  elif i==1:
    dp[i]=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[-1])
Buggy code:
def I():
	return int(sys.stdin.readline().rstrip())


def IL():
	return list(map(int, sys.stdin.readline().rstrip().split()))

  
N = I()
h_i = IL()
dp = [0 for _ in range(N)]
for i in range(N):
	if i == 0:
		pass
	elif i == 1:
		dp[i] = abs(h_i[i] - h_i[i-1])
	else:
		point_1 = abs(h_i[i] - h_i[i-1]) + dp[i-1]
		point_2 = abs(h_i[i] - h_i[i-2]) + dp[i-2]
		if point_1 <= point_2:
			dp[i] = point_1
		else:
			dp[i] = point_2

print(dp[-1])

Fixed code:
import sys
def I():
	return int(sys.stdin.readline().rstrip())


def SL():
	return S().split()


def IL():
	return list(map(int, sys.stdin.readline().rstrip().split()))


N = I()
h_i = IL()
dp = [0 for _ in range(N)]
for i in range(N):
	if i == 0:
		pass
	elif i == 1:
		dp[i] = abs(h_i[i] - h_i[i-1])
	else:
		point_1 = abs(h_i[i] - h_i[i-1]) + dp[i-1]
		point_2 = abs(h_i[i] - h_i[i-2]) + dp[i-2]
		if point_1 <= point_2:
			dp[i] = point_1
		else:
			dp[i] = point_2

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

Fixed code:
N = int(input())
h = list(map(int,input().split()))
n = 2
cost = [0]*N
cost[1] = abs(h[1]-h[0])
for n in range(2,N):
    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:
def solve():
    N = int(input())
    h = list(map(int, input().split()))

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

if __name__ == '__main__':
    solve()


Fixed code:
def solve():
    N = int(input())
    h = list(map(int, input().split()))

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

if __name__ == '__main__':
    solve()
Buggy code:
N=int(input())
h=list(map(int,input().split()))

c=[0]*N
c[1]=h[1]-h[0]
for i in range(2,N):
  c[i]=min(c[i-2]+abs(h[i]-h[i-2]),c[i-1]+abs(h[i]-h[i-1]))
print(c[-1])

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

c=[0]*N
c[1]=abs(h[1]-h[0])
for i in range(2,N):
  c[i]=min(c[i-2]+abs(h[i]-h[i-2]),c[i-1]+abs(h[i]-h[i-1]))
print(c[-1])
Buggy code:
n=int(input())
h=[int(i) for i in input().split()]
dp=[100000 for i in range(n+1)]
dp[0]=0
for i in range(2,n+1):
    dp[i]=min(dp[i-2]+abs(h[i-1]-h[max(0,i-3)]),dp[i-1]+abs(h[i-1]-h[i-2]))
print(dp[n])

Fixed code:
n=int(input())
h=[int(i) for i in input().split()]
dp=[100000 for i in range(n+1)]
dp[0],dp[1]=0,0
for i in range(2,n+1):
    dp[i]=min(dp[i-2]+abs(h[i-1]-h[max(0,i-3)]),dp[i-1]+abs(h[i-1]-h[i-2]))
print(dp[n])
Buggy code:
n = int(input())
h = list(map(int, input().split()))

import numpy as np

d = [0] * n #ex. [0, 0, 0, 0, 0, 0]

d[1] = np.abs(h[1] - h[0])

for i in range(n-2):
    d[i+2] = min(d[i] + np.abs(h[i+2] - h[i]), d[i] + np.abs(h[i+1] - h[i]))
    
print(d[n-1])
    



Fixed code:
n = int(input())
h = list(map(int, input().split()))
 
import numpy as np
 
d = [0] * n #ex. [0, 0, 0, 0, 0, 0]
 
d[1] = np.abs(h[1] - h[0])
 
for i in range(n-2):
    d[i+2] = min(d[i] + np.abs(h[i+2] - h[i]), d[i+1] + np.abs(h[i+1] - h[i+2]))
    
print(d[n-1])
Buggy code:
n = int(input())
h = list(map(int,input().split()))
dp = [0]*n
dp[0] = 0
dp[1] = 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])

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

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

INF = float('inf')
dp = [INF] * 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[-1])

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

INF = float('inf')
dp = [INF] * 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())
l=list(map(int,input().split()))
dp=[0 for i in range(n)]

dp[1]=l[1]-l[0]
for i in range(2,n):
    dp[i]=min(dp[i-1]+l[i]-l[i-1],dp[i-2]+l[i]-l[i-2])

print(dp[n-1])


Fixed code:
n=int(input())
l=list(map(int,input().split()))
dp=[0 for i in range(n)]

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

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


Fixed code:
N=int(input())
A=list(map(int,input().split()))
A+=[0]
A+=[0]
dp=[float("INF")]*(N+2)
dp[0]=0
dp[1]=abs(A[1]-A[0])
for i in range(N):
  dp[i+1]=min(dp[i+1],abs(A[i+1]-A[i])+dp[i])
  dp[i+2]=min(dp[i+2],abs(A[i+2]-A[i])+dp[i])
print(dp[N-1])
Buggy code:
N = int(input())
hlist = list(map(int, input().split()))
dp = [0] * N
dp[0] = 0
dp[1] = abs(hlist[0] - hlist[1])
for i in range(2, N):
    cost1 = abs(hlist[i] - hlist[i - 1])
    cost2 = abs(hlist[i] - hlist[i - 2])
    dp[i] = min(cost1, cost2)

print(dp[-1])


Fixed code:
N = int(input())
hlist = list(map(int, input().split()))
dp = [0] * N
dp[0] = 0
dp[1] = abs(hlist[0] - hlist[1])
for i in range(2, N):
    cost1 = dp[i - 1] + abs(hlist[i] - hlist[i - 1])
    cost2 = dp[i - 2] + abs(hlist[i] - hlist[i - 2])
    dp[i] = min(cost1, cost2)

print(dp[-1])
Buggy code:
sys.setrecursionlimit(10**9)
N = int(input())
h = list(map(int, input().split()))
memo = [-1]*N
def dp(i):
    if memo[i]>=0:
        return memo[i]
    if i == 0:
        memo[i] = 0
        return 0
    if i>=2:
        memo[i] = min(dp(i-1)+abs(h[i]-h[i-1]), dp(i-2)+abs(h[i]-h[i-2]))
    else:
        memo[i] = dp(i-1)+abs(h[i]-h[i-1])
    return memo[i]
print(dp(N-1))



Fixed code:
import sys
sys.setrecursionlimit(10**9)
N = int(input())
h = list(map(int, input().split()))
memo = [-1]*N
def dp(i):
    if memo[i]>=0:
        return memo[i]
    if i == 0:
        memo[i] = 0
        return 0
    if i>=2:
        memo[i] = min(dp(i-1)+abs(h[i]-h[i-1]), dp(i-2)+abs(h[i]-h[i-2]))
    else:
        memo[i] = dp(i-1)+abs(h[i]-h[i-1])
    return memo[i]
print(dp(N-1))
Buggy code:
N = int(input())
h = list(map(int, input().split()))
dp = [float('inf')]*N
for i in range(N-1):
    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[-1])


Fixed code:
N = int(input())
h = list(map(int, input().split()))
dp = [float('inf')]*N
dp[0] = 0
for i in range(N-1):
    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[-1])
Buggy code:
import sys

n = int(sys.stdin.readline())

dp = [0 for i in range(n+1)]
cost = list(map(int, sys.stdin.readline().split()))

dp[1] = cost[0]
dp[2] = abs(dp[1] - cost[2])


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


Fixed code:
import sys

n = int(sys.stdin.readline())

dp = [0 for i in range(n+1)]
cost = list(map(int, sys.stdin.readline().split())) # 0~3
cost.insert(0, 0)

dp[2] = abs(cost[1] - cost[2])


for i in range(3, n+1):
  dp[i] = min(dp[i-1] + abs(cost[i-1] - cost[i]), dp[i-2] + abs(cost[i-2] - cost[i]))
  
print(dp[n])
Buggy code:
n = int(input())
a = list(map(int, input().split()))

dp = [0] * n
dp[0] = 0
dp[1] = abs(a[0] - a[1])
dp[2] = dp[0]
for i in range(2, n):
  dp[i] = min(dp[i-2] + abs(a[i-2] - a[i]) , d[i - 1] + abs(a[i - 1] - a[i]))

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

dp = [2 ** 32] * (N + 1)
dp[0] = 0

for i in range(N):
    for j in range(1, 3):
        if i + j < N:
            dp[i+j] = min(dp[i+j], dp[i] + abs(Hs[i+j]-Hs[i]))
print(dp[N])



Fixed code:

N = int(input())
Hs = list(map(int, input().split()))

dp = [2 ** 32] * N
dp[0] = 0

for i in range(N):
    for j in range(1, 3):
        if i + j < N:
            dp[i+j] = min(dp[i+j], dp[i] + abs(Hs[i+j]-Hs[i]))
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(0, n - 1):
    print(i)
    dp[i + 1] = min(dp[i + 1], dp[i] + abs(h[i] - h[i + 1]))
    if i + 2 >= n:
        continue
    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 = [float('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 > 0:
        dp[i] = min(dp[i], dp[i-2] + abs(h[i] - h[i-2]))

print(dp[-1])
Buggy code:
def func(h):
    cost = [0]*len(h)

    for i in range(1,len(h)):
        if i == 1:
            cost[i] = h[i] - h[i-1]
        else:
            cost[i] = min(cost[i - 1]+abs(h[i]-h[i-1]), cost[i - 2]+abs(h[i]-h[i-2]))
    
    return cost[-1]



n = int(input())
h = list(map(int, input().strip().split(" ")))[:n]

print(func(h))

Fixed code:
def func(h):
    cost = [0]*len(h)

    for i in range(1,len(h)):
        if i == 1:
            cost[i] =abs( h[i] - h[i-1] )
        else:
            if i >1:
                cost[i] = min((cost[i - 1]+ abs(int(h[i])-int(h[i-1]))), (cost[i - 2]+ abs(int(h[i])-int(h[i-2]) ) ))

    #print(cost)
    
    return cost[-1]



n = int(input())
h = list(map(int, input().strip().split(" ")))[:n]

print(func(h))