qyliang/CodeNanoFix huggingface dataset:
Buggy code:
n, K = map(int, input().split())
heights = list(map(int, input().split()))
dp = [float('inf') for i in range(n)]
dp[0] = 0

for i in range(1, n):

    dp[i] = min(dp[i], dp[i - 1] + abs(heights[i] - heights[i - 1]))
    if i > 1:
        for k in range(1, K + 1):
            dp[i] = min(dp[i], dp[i - k] + abs(heights[i] - heights[i - k]))

print(dp[n - 1])

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

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

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

Fixed code:
n,*h=map(int,open(0).read().split());d=[0]*n;d[1]=abs(h[1]-h[0])
for i in range(2,n):
  d[i]=min(d[i-1]+abs(h[i]-h[i-1]),d[i-2]+abs(h[i]-h[i-2]))
print(d[-1])
Buggy 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-1]))
print(dp[-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[-1])
Buggy code:
N = int(input())
a = [int(x) for x in input().split()]
def dp(N,a):
    F = [0]*(len(a)+1)
    F[0]=0
    F[1]=a[0]
    F[2]=abs(a[1]-a[0])
    if N == 1: return F[1]
    elif N == 2: return F[2]
    #F[3] = min(F[1]+abs(a[2]))
    for n in range(3,N+1):
        F[n] = min(F[n-1] + abs(a[n-1]-a[n-2]),F[n-2]+abs(a[n-1]-a[n-3]))
    print(F)
    return F[-1] 
print(dp(N,a))

Fixed code:
N = int(input())
a = [int(x) for x in input().split()]
def dp(N,a):
    F = [0]*(len(a))
    F[0]=0
    F[1]=abs(a[1]-a[0])
    if N == 1: return F[0]
    elif N == 2: return F[1]
    for n in range(2,N):
        F[n] = min(F[n-1] + abs(a[n]-a[n-1]),F[n-2]+abs(a[n]-a[n-2]))
    return F[-1] 
print(dp(N,a))
Buggy code:
n = int(input())
h = list(map(int,input().split()))

cost1 = 0
cost2 = 0
cost = [0]
cost.append(abs(h[0]-h[1]))
print(cost)
    
for flog in range(2,len(h)):
    cost1 = cost[flog-2] + abs(h[flog] - h[flog-2])
    cost2 = cost[flog-1] + abs(h[flog] - h[flog-1])
    cost.append(min(cost1,cost2))
    #print(cost)
    
print(cost[-1])

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

cost1 = 0
cost2 = 0
cost = [0]
cost.append(abs(h[0]-h[1]))
    
for flog in range(2,len(h)):
    cost1 = cost[flog-2] + abs(h[flog] - h[flog-2])
    cost2 = cost[flog-1] + abs(h[flog] - h[flog-1])
    cost.append(min(cost1,cost2))
    #print(cost)
    
print(cost[-1])
Buggy code:
N = int(input())
h = list(map(int,input().split()))
dp = [999999] * N

dp[0] = 0
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)
print(dp[N-1])


Fixed code:
N = int(input())
h = list(map(int,input().split()))
dp = [999999] * N

dp[0] = 0
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())
stage = list(map(int, input().split(" ")))

INF = float('inf')
DP = [INF for i in range(N)]

for i in range(N):
    if i == 1:
        DP[i] = abs(stage[i] - stage[i-1])
    elif i == 2:
        DP[i] = min(abs(stage[i] - stage[i-2]), DP[i-1] + abs(stage[i] - stage[i-2]))
    else:
        DP[i] = min(DP[i-1] + abs(stage[i] - stage[i-1]), DP[i-2] + abs(stage[i] - stage[i-2]))

print(DP)
print(DP[N-1])

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

INF = float('inf')
DP = [INF for i in range(N)]

for i in range(N):
    if i == 1:
        DP[i] = abs(stage[i] - stage[i-1])
    elif i == 2:
        DP[i] = min(abs(stage[i] - stage[i-2]), DP[i-1] + abs(stage[i] - stage[i-2]))
    else:
        DP[i] = min(DP[i-1] + abs(stage[i] - stage[i-1]), DP[i-2] + abs(stage[i] - stage[i-2]))

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

dp = [10 ** 5 for i in range(n)]
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[0]), dp[i] + abs(h[i+1] - h[i]))
print(dp[-1])

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

dp = [10 ** 5 for i in range(n)]
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]))
print(dp[-1])
Buggy code:
n = int(input())
height = list(map(int, input().split()))

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

print(dis[-1])

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

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

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

dp = [10**8]*n

dp[0] = 0
dp[1] = h[1] - h[0]

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

Fixed code:
n=int(input())
h=list(map(int, input().split()))
dp=[10**10]*n
dp[0]=0
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:
n = int(input())
arr = [int(i) for i in input().split()]
dp = [0 for i in range(n)]
print(dp)
for i in range(1,n):
    op1 = abs(arr[i]-arr[i-1]) + dp[i-1]
    op2 = abs(arr[i]-arr[i-2]) + dp[i-2] if i != 1 else float("inf")
    dp[i] = min(op1,op2)
print(dp[n-1])

Fixed code:
n = int(input())
arr = [int(i) for i in input().split()]
dp = [0 for i in range(n)]
for i in range(1,n):
    op1 = abs(arr[i]-arr[i-1]) + dp[i-1]
    op2 = abs(arr[i]-arr[i-2]) + dp[i-2] if i != 1 else float("inf")
    dp[i] = min(op1,op2)
print(dp[n-1])
Buggy code:
n = int(input())
h = [int(x) for x in input().split()]
inf = float('inf')
dp = [inf] * n  # initialize dp
dp[0] = 0
dp[1] = abs(h[1] - h[0])
for i in range(1, n):
    if abs(h[i] - h[i-1]) < abs(h[i] - h[i-2]):
        dp[i] = dp[i-1] + abs(h[i] - h[i-1])
    else:
        dp[i] = dp[i-2] + abs(h[i] - h[i-2])
print(dp[-1])

Fixed code:
n = int(input())
h = [int(x) for x in input().split()]
inf = float('inf')
dp = [inf] * n  # initialize dp
dp[0] = 0
for i in range(1, n):
    if i == 1:
        dp[i] = abs(h[i] - h[i-1])
    elif (dp[i-1] + abs(h[i] - h[i-1])) < (dp[i-2] + abs(h[i] - h[i-2])):
        dp[i] = dp[i-1] + abs(h[i] - h[i-1])
    else:
        dp[i] = dp[i-2] + abs(h[i] - h[i-2])
print(dp[-1])
Buggy code:
N = int(input())
nums = list(map(int, input().split()))
INF = 10**10
dp = [INF] * (N)
dp[0] = 0
dp[1] = abs(nums[1]-nums[0])
for _ in range(2, N):
  dp[i] = min(dp[i-2]+abs(nums[i]-nums[i-2]), dp[i-1]+abs(nums[i]-nums[i-1]))
print(dp[N-1])

Fixed code:
N = int(input())
nums = list(map(int, input().split()))
INF = 10**10
dp = [INF] * (N)
dp[0] = 0
dp[1] = abs(nums[1]-nums[0])
for i in range(2, N):
  dp[i] = min(dp[i-2]+abs(nums[i]-nums[i-2]), dp[i-1]+abs(nums[i]-nums[i-1]))
print(dp[N-1])
Buggy code:
N = int(input())
h = list(map(int, input().split()))
# N = 6
# h = [30, 10, 60, 10, 60, 50]
dp = [0]*(N)
print("ini dp", dp)
for i in range(1, N):
    if i == 1:
        dp[1] = abs(h[1]-h[0])
        print("ini dp 1", dp)

    else:
        dp[i] = min(dp[i-1]+abs(h[i]-h[i-1]), dp[i-2]+abs(h[i]-h[i-2]))
        print("ini dp 2", dp)

print(dp[-1])

Fixed code:
N = int(input())
h = list(map(int, input().split()))
# N = 6
# h = [30, 10, 60, 10, 60, 50]
dp = [0]*(N)
# print("ini dp", dp)
for i in range(1, N):
    if i == 1:
        dp[1] = abs(h[1]-h[0])
        # print("ini dp 1", dp)

    else:
        dp[i] = min(dp[i-1]+abs(h[i]-h[i-1]), dp[i-2]+abs(h[i]-h[i-2]))
        # print("ini dp 2", dp)

print(dp[-1])
Buggy code:
n = input()
h = [i for i in map(int, input())]

DP = [0, abs(h[0]-h[1])]

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

print(DP[-1])

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

DP = [0, abs(h[0]-h[1])]

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

print(DP[-1])
Buggy code:
N = int(input())
H = map(int,input().split())

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

for i in range(2,N):
  on = A[i-1] + abs(H[i] - H[i-1])
  tw = A[i-2] + abs(H[i] - H[i-2])
  A[i] = min(on , tw)

print(A[N])


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

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

for i in range(2,N):
  on = A[i-1] + abs(H[i] - H[i-1])
  tw = A[i-2] + abs(H[i] - H[i-2])
  A[i] = min(on , tw)

print(A[N-1])
Buggy code:
import math

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

cost_list = [math.inf for _ in range(n)]

cost_list[0]=0
cost_list[1]=list_[1]-list_[0]

for i in range(2,n):
  one = cost_list[i-1] + abs(list_[i]-list_[i-1])
  two = cost_list[i-2] + abs(list_[i]-list_[i-2])
  
  cost_list[i]=min(one,two,)
  
print(cost_list[-1])

Fixed code:
import math

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

cost_list = [math.inf for _ in range(n)]

cost_list[0]=0
cost_list[1]=abs(list_[1]-list_[0])

for i in range(2,n):
  one = cost_list[i-1] + abs(list_[i]-list_[i-1])
  two = cost_list[i-2] + abs(list_[i]-list_[i-2])
  
  cost_list[i]=min(one,two,)
  
print(cost_list[-1])
Buggy code:
n=int(input())
H=list(map(int,input().split()))
dp=[10**9]*(n)
dp[0]=0
for i in range(n):
    if i==1:
        dp[i]=min(dp[i],dp[i-1]+abs(H[i]-H[i-1]))
    elif i>1:
        dp[i]=min(dp[i],dp[i-1]+abs(H[i]-H[i-1]),dp[i-2]+abs(H[i]-H[i-2]))

print(dp[n]) 

Fixed code:
n=int(input())
H=list(map(int,input().split()))
dp=[10**9]*(n)
dp[0]=0
for i in range(n):
    if i==1:
        dp[i]=min(dp[i],dp[i-1]+abs(H[i]-H[i-1]))
    elif i>1:
        dp[i]=min(dp[i],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())
list = [int(i) for i in input().split(" ")]

def cost(N):
    dp = [0] * N
    dp[0] = list[0]
    dp[1] = abs(list[1]-list[0])
    for i in range(2,N):
        dp[i] = min([dp[i-1]+abs(list[i-1]-list[i]),dp[i-2]+abs(list[i-2]-list[i])])
    return dp[N-1]

print(cost(N))

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

def cost(N):
    dp = [0] * N
    dp[0] = 0
    dp[1] = abs(list[1]-list[0])
    for i in range(2,N):
        dp[i] = min([dp[i-1]+abs(list[i-1]-list[i]),dp[i-2]+abs(list[i-2]-list[i])])
    return dp[N-1]

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

for i in range(N):
    dp[i] = rec_dp(i,dp)

def rec_dp(i,dp):
    if i==0:
        return 0
    elif i==1:
        return abs(h[1]-h[0])
    else:
        onestepmin = dp[i-1] + abs(h[i-1] - h[i])
        twostepmin = dp[i-2] + abs(h[i-2] - h[i])
        return min(onestepmin,twostepmin)


print(dp[N-1])

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

def rec_dp(i,dp):
    if i==0:
        return 0
    elif i==1:
        return abs(h[1]-h[0])
    else:
        onestepmin = dp[i-1] + abs(h[i-1] - h[i])
        twostepmin = dp[i-2] + abs(h[i-2] - h[i])
        return min([onestepmin,twostepmin])

for i in range(N):
    dp[i] = rec_dp(i,dp)

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

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

dp = [1e7]*N
dp[0] = h[0]
dp[1] = abs(h[1]-h[0])

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

print(dp[-1])


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

dp = [1e7]*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())
hs=input().rstrip().split(" ")
costs=[0 for i in range(n)]
costs[1]=abs(int(hs[1])-int(hs[0]))
for i in range(n-2):
    jump=costs[i]+abs(int(hs[i+2])-int(hs[i]))
    walk=costs[i+1]+abs(int(hs[i+1])-int(hs[i]))
    costs[i+2]=min(jump,walk)
print(costs[-1])

Fixed code:
n=int(input())
hs=input().rstrip().split(" ")
costs=[0 for i in range(n)]
costs[1]=abs(int(hs[1])-int(hs[0]))
for i in range(n-2):
    jump=costs[i]+abs(int(hs[i+2])-int(hs[i]))
    walk=costs[i+1]+abs(int(hs[i+2])-int(hs[i+1]))
    costs[i+2]=min(jump,walk)
print(costs[-1])
Buggy code:
import sys
sys.setrecursionlimit(200000)
 
n = int(input())
 
h = [int(i) for i in input().split()]

d = {}
 
def dp(cost, p):
  if p in d:
    return d[p]
  if p == n-1:
    return cost
  if p < n-2:
    m = min(dp(cost+abs(h[p]-h[p+1]), p+1), dp(cost+abs(h[p]-h[p+2]), p+2))
    d[p] = m
    return m
  if p == n-2:
    return dp(cost+abs(h[p]-h[p+1]), p+1)

print(dp(0, 0))

Fixed code:
import sys
sys.setrecursionlimit(200000)
 
n = int(input())
 
h = [int(i) for i in input().split()]
 
d = {}
 
def dp(p):
  if p in d:
    return d[p]
  if p == n-1:
    return 0
  if p < n-2:
    m = min(dp(p+1)+abs(h[p]-h[p+1]), dp(p+2)+abs(h[p]-h[p+2]))
    d[p] = m
    return m
  if p == n-2:
    return dp(p+1)+abs(h[p]-h[p+1])

print(dp(0))
Buggy code:
N = int(input())
h = list(map(int, input().split()))
dp = [0]*N
# dp[0], dp[1] = 0, abs(h[1] - h[0])
dp[0] = 0
for i in range(2,N):
    dp[i] = dp[i-1] + abs(h[i]-h[i-1])
    if i > 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-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-1]+abs(h[i-1]-h[i]), dp[i-2]+abs(h[i-2]-h[i]))
print(dp[N-1])
Buggy code:
INF =10001
N = int(input())
h = [int(i) for i in input().split()]
i = 2
dp = [INF for i in range(N)]
dp[0],dp[1] = 0,abs(h[1]-h[0])

while i<N:
    dp[i] = min(dp[i-1],abs(h[i] - h[i-1]))
    dp[i] = min(dp[i-2],abs(h[i] - h[i-2]))
    i+=1
    
print(sum(dp))

Fixed code:
INF =10001
N = int(input())
h = [int(i) for i in input().split()]
i = 2
dp = [INF for i in range(N)]
dp[0],dp[1] = 0,abs(h[1]-h[0])

while not i==N:
    dp[i] = min(dp[i-2]+abs(h[i] - h[i-2]),dp[i-1]+abs(h[i] - h[i-1]))
    i+=1
    
print(dp[N-1])
Buggy code:
n=int(input())
*h,=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]-h[i+1]))
      if i<n-2:
            dp[i+2]=min(dp[i+2],dp[i]+abs(h[i]-h[i+1]))
print(dp[-1])


Fixed code:
n=int(input())
*h,=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<(n-2):
            dp[i+2]=min(dp[i+2],dp[i]+abs(h[i+2]-h[i]))

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

dp = [0] * (N+1)
dp[1] = H[0]

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

res = dp[N]
print(res)

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(abs(h[i]-h[i-1])+dp[i-1], abs(h[i]-h[i-2])+dp[i-2])
print(dp[N-1])
Buggy code:
def printArray(arr):
  for i in range(0, len(arr)):
    print(arr[i])
    
def minimumCost(n, k, hights):  
  if (n < 2):
    print("0")
  else:
    memo = []
    memo.append(0)
    memo.append(abs(hights[0] - hights[1]))
    for i in range(2, n):
      memo.append(abs(hights[i] - hights[i - 1]) + memo [i - 1])
      for j in range(2, k + 1):
        if (i - j) >= 0:
        	memo[i] = min(memo[i],
                      (abs(hights[i] - hights[i - j]) + memo [i - j]))
    print(memo[n-1])
    
(n, k) = map(int,input().split())
hights = list(map(int,input().split()))
minimumCost(n, k, hights)

Fixed code:
def printArray(arr):
  for i in range(0, len(arr)):
    print(arr[i])
    
def minimumCost(n, hights):  
  if (n < 2):
    print("0")
  else:
    memo = []
    memo.append(0)
    memo.append(abs(hights[0] - hights[1]))
    for i in range(2, n):
      memo.append(min(
        (abs(hights[i] - hights[i - 1]) + memo [i - 1]), 
        (abs(hights[i] - hights[i - 2]) + memo [i - 2])
      ))
    print(memo[n-1])
    
n = int(input())
hights = list(map(int,input().split()))
minimumCost(n, hights)
Buggy code:
n = int(input())
h = list(map(int, input().split()))
dp = [0] * n
for i in range(n):
  if i == 0:
    continue
  elif i == 1:
    dp[1] = abs(h[1] - h[0])
    continue
  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 = [0] * n
for i in range(n):
  if i == 0:
    continue
  elif i == 1:
    dp[1] = abs(h[1] - h[0])
    continue
  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])
Buggy code:
from sys import stdin, stdout, setrecursionlimit
from collections import deque, defaultdict, Counter
from heapq import heappush, heappop
import math

rl = lambda: stdin.readline()
rll = lambda: stdin.readline().split()
rli = lambda: map(int, stdin.readline().split())
rlf = lambda: map(float, stdin.readline().split())

INF, NINF = float('inf'), float('-inf')

def main():
	n = int(rl())
	A = list(rli())
	dp = [INF for _ in range(n)]
	dp[0] = 0
	dp[1] = abs(A[0] - A[1])
	for i in range(2, n):
		dp[i] = min(dp[i], 
					dp[i-2] + abs(A[i-2]-A[i]),
					dp[i-1] + abs(A[i-1]-A[i])
					)
	stdout.close()

if __name__ == "__main__":
	main()

Fixed code:
from sys import stdin, stdout, setrecursionlimit
from collections import deque, defaultdict, Counter
from heapq import heappush, heappop
import math

rl = lambda: stdin.readline()
rll = lambda: stdin.readline().split()
rli = lambda: map(int, stdin.readline().split())
rlf = lambda: map(float, stdin.readline().split())

INF, NINF = float('inf'), float('-inf')

def main():
	n = int(rl())
	A = list(rli())
	dp = [INF for _ in range(n)]
	dp[0] = 0
	dp[1] = abs(A[0] - A[1])
	for i in range(2, n):
		dp[i] = min(dp[i], 
					dp[i-2] + abs(A[i-2]-A[i]),
					dp[i-1] + abs(A[i-1]-A[i])
					)
	print(dp[-1])
	stdout.close()

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

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

for i in range(len(h)):
    if i > 1:
        a,b = b, min(abs(h[i-2]-h[i])+a, abs(h[i-1]+h[i])+b)
    
print(b)

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

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

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

Fixed code:
size=int(input())
h = list(map(int,input().split()))
dp = [0 for _ in range(size)]
for i in range(1,size):
    if i == 1:
        dp[i] = dp[0]+abs(h[0]-h[1])
    else:
        a = dp[i-2]+abs(h[i-2]-h[i])
        b = dp[i-1]+abs(h[i-1]-h[i])
        if a < b:
            dp[i] = a
        else:
            dp[i] = b
print(dp[-1])
Buggy code:
def main():
    n = int(input())
    h = list(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] = max(dp[0] + abs(h[i] - h[i - 2]), dp[1] + abs(h[i] - h[i - 1]))
    print(dp[n - 1])


if __name__ == '__main__':
    main()


Fixed code:
def main():
    n = int(input())
    h = list(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 - 2] + abs(h[i] - h[i - 2]),
                    dp[i - 1] + abs(h[i] - h[i - 1]))
    print(dp[n - 1])


if __name__ == '__main__':
    main()
Buggy code:
import math
# import sys
# import os
# f = open('input.txt', 'r')
# sys.stdin = f

n = int(input())
h = list(input().split())
h = [int(i) for i in h]
dp = [100000]*n
dp[0] = 0
dp[1] = 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:
import math
import sys
# import os
# f = open('input.txt', 'r')
# sys.stdin = f

n = int(input())
h = list(input().split())
h = [int(i) for i in h]
dp = [100000]*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:
# EDPC A Frog 1

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

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

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

print(cost)
print(cost[N-1])

Fixed code:
# EDPC A Frog 1

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

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

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

print(cost[N-1])
Buggy code:
num = list(map(int, input().split()))
H = list(map(int, input().split()))
N = num[0]
K = num[1]

dp = [float("inf")] * N
dp[0] = 0
for i in range(N):
    try:
        for j in range(K):
            dp[i+1] = min(dp[i+1], dp[i-j]+abs(H[i+1]-H[i-j]))
    except:
        continue

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):
    try:
        dp[i+1] = min(dp[i+1], dp[i]+abs(H[i+1]-H[i]))
        dp[i+1] = min(dp[i+1], dp[i-1]+abs(H[i+1]-H[i-1]))
    except:
        continue

print(dp[-1])
Buggy code:
N = int(input())
h = [int(x) for x in input().split()]

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

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

Fixed code:
N = int(input())
A = [int(x) for x in input().split()]

inf = float("inf")
dp = [inf] * N
dp[0] = 0
dp[1] = abs(A[0]-A[1])
         
for i in range(2, N):
    dp[i] = min(dp[i], dp[i-1]+abs(A[i]-A[i-1]))
    dp[i] = min(dp[i], dp[i-2]+abs(A[i]-A[i-2]))
        
print(dp[N-1])
Buggy code:
n = int(input())
hs = [int(c) for c in input().split()]
dp = [0] * n
dp[0] =  0
dp[1] = abs(hs[0] - hs[1])
for i in range(2, n):
  dp[i] = min(dp[i-1] + abs(hs[i-1] - hs[i]), dp[i-2] + abs(hs[i-2] - hs[i]))
  print(dp[-1])

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

def minv(i, v):
  if i < len(H):
    if P[i] < 0:
      P[i] = v
    else:
      P[i] = min(P[i], v)

for i in range(len(H)-1):
  minv(i + 1, H[i] + abs(H[i] - H[i+1]))
  minv(i + 2, H[i] + abs(H[i] - H[i+2]))

print(H[-1])

Fixed code:
N = int(input())
H = list(map(int, input().split()))
P = [0] + [-1] * (len(H)-1)

def minv(i, v):
  if i < len(H):
    cost = v()
    if P[i] < 0:
      P[i] = cost
    else:
      P[i] = min(P[i], cost)

for i in range(len(H)-1):
  minv(i + 1, lambda : P[i] + abs(H[i] - H[i+1]))
  minv(i + 2, lambda : P[i] + abs(H[i] - H[i+2]))

print(P[-1])
Buggy code:
n = int(input())
h = [int(s) for s in input().split()]

dp = [0] * n
dp[0],dp[1] = 0,abs(dp[1]-dp[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 = [int(s) for s in input().split()]

dp = [0] * 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])