qyliang/CodeNanoFix huggingface dataset:
Buggy code:

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

dp = [] * N
dp[0] = 0

for i in range(1, N):
  tmp1 = dp[i-1] + abs(H[i] - H[i-1])
  tmp2 = dp[i-2] + abs(H[i] - H[i-2]) if i > 1 else 2**64
  dp[i] = min(tmp1, tmp2)
  
print(dp[N-1])
  
    
             
  


Fixed code:

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

dp = [0] * N
dp[0] = 0

for i in range(1, N):
  tmp1 = dp[i-1] + abs(H[i] - H[i-1])
  tmp2 = dp[i-2] + abs(H[i] - H[i-2]) if i > 1 else 2**64
  dp[i] = min(tmp1, tmp2)
  
print(dp[N-1])
Buggy code:
import sys


n = int(sys.stdin.readline().strip())
hs = list(map(int, sys.stdin.readline().strip().split(' ')))
print(n,hs)

dp = [0]*n

for i in range(1, n):
    x = 10**10
    if i-1 >= 0:
        x = min(x, dp[i-1]+abs(hs[i]-hs[i-1]))
    if i-2 >= 0:
        x = min(x, dp[i-2]+abs(hs[i]-hs[i-2]))
    dp[i] = x
print(dp[n-1])

Fixed code:
import sys


n = int(sys.stdin.readline().strip())
hs = list(map(int, sys.stdin.readline().strip().split(' ')))


dp = [0]*n

for i in range(1, n):
    x = 10**10
    if i-1 >= 0:
        x = min(x, dp[i-1]+abs(hs[i]-hs[i-1]))
    if i-2 >= 0:
        x = min(x, dp[i-2]+abs(hs[i]-hs[i-2]))
    dp[i] = x
print(dp[n-1])
Buggy code:
n=int(input())
sys.setrecursionlimit(10 ** 6)
h=list(map(int,input().split()))
cos={0:0,1:abs(h[1]-h[0])}
def cost(x):
  if x not in cos:
    d1=cost(x-1)+abs(h[x]-h[x-1])
    d2=cost(x-2)+abs(h[x]-h[x-2])
    cos[x]=min(d1,d2)
    return cos[x]
  else:
    return cos[x]
  
print(cost(n-1))

Fixed code:
n=int(input())
import sys
sys.setrecursionlimit(10 ** 6)
h=list(map(int,input().split()))
cos={0:0,1:abs(h[1]-h[0])}
def cost(x):
  if x not in cos:
    d1=cost(x-1)+abs(h[x]-h[x-1])
    d2=cost(x-2)+abs(h[x]-h[x-2])
    cos[x]=min(d1,d2)
    return cos[x]
  else:
    return cos[x]
  
print(cost(n-1))
Buggy code:
N = int(input())
h = [int(i) for i in input().split()]
dp = [inf for _ in range(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])

Fixed code:
N = int(input())
h = [int(i) for i in input().split()]
dp = [10**10 for _ in range(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 math
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])
 

Fixed code:
import math
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:
from bisect import bisect_left as bl
from bisect import bisect_right as br
from heapq import heappush,heappop
import math
from collections import *
from functools import reduce,cmp_to_key
import sys
input = sys.stdin.readline

M = mod = 10**9 + 7
def factors(n):return sorted(set(reduce(list.__add__, ([i, n//i] for i in range(1, int(n**0.5) + 1) if n % i == 0))))
def inv_mod(n):return pow(n, mod - 2, mod)

def li():return [int(i) for i in input().rstrip('\n').split()]
def st():return input().rstrip('\n')
def val():return int(input().rstrip('\n'))
def li2():return [i for i in input().rstrip('\n')]
def li3():return [int(i) for i in input().rstrip('\n')]
def li4():return [float(i) for i in input().rstrip('\n').split(' ')]








n = val()
l = li()

if n < 2:
    print(sum(l))
    exit()
ans = [0]*n
for i in range(n):
    ans[i] = min(ans[i-1] + abs(l[i] - l[i-1]),ans[i-2] + abs(l[i] - l[i-2]))
    ans[0] = 0
print(ans[-1])

Fixed code:
from bisect import bisect_left as bl
from bisect import bisect_right as br
from heapq import heappush,heappop
import math
from collections import *
from functools import reduce,cmp_to_key
import sys
input = sys.stdin.readline

M = mod = 10**9 +7
def factors(n):return sorted(set(reduce(list.__add__, ([i, n//i] for i in range(1, int(n**0.5) + 1) if n % i == 0))))
def inv_mod(n):return pow(n, mod - 2, mod)

def li():return [int(i) for i in input().rstrip('\n').split()]
def st():return input().rstrip('\n')
def val():return int(input().rstrip('\n'))
def li2():return [i for i in input().rstrip('\n')]
def li3():return [int(i) for i in input().rstrip('\n')]
def li4():return [float(i) for i in input().rstrip('\n').split(' ')]








n = val()
l = li() + [2,2]

if n == 1:
    print(0)
    exit()
elif n == 2:
    print(abs(l[0] - l[1]))
    exit()
ans = [float('inf')]*(n + 2)
ans[0] = 0
for i in range(n):
    ans[i + 1] = min(ans[i + 1],ans[i] + abs(l[i] - l[i+1]))
    ans[i + 2] = min(ans[i + 2],ans[i] + abs(l[i] - l[i+2]))
print(ans[n-1])
Buggy code:
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-1] + abs(h[i]-h[i-1]), dp[i-2] + abs(h[i]-h[i-2]))

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

dp=[0]*N

for i in range(1,N):
	if i==1:
		dp[i] = abs(h[i] - h[i-1])
	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:
n = int(input())
h = list(map(int,input().split()))
c = [0]*n
c[1]=abs(h[1]-h[0])
for i in range(1,n):
    c[i]=min(c[i-2]+abs(h[i]-h[i-2]),c[i-1]+abs(h[i]-h[i-1]))
print(c[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:
def func(arr):
    crr=[0 for i in range(len(arr))]
    crr[0]=arr[0]
    crr[1]=arr[1]-arr[0]
    for i in range(2,len(arr)):
        crr[i]=min(abs((arr[i]-arr[i-1]))+crr[i-1],abs((arr[i]-arr[i-2]))+crr[i-2])
    print(crr)
    
b=input()
ar=list(map(int,input().split())
func(ar)

Fixed code:
def func(arr):
    crr=[0 for i in range(len(arr))]
    crr[0]=0
    crr[1]=abs(arr[1]-arr[0])
    for i in range(2,len(arr)):
        crr[i]=min(abs((arr[i]-arr[i-1]))+crr[i-1],abs((arr[i]-arr[i-2]))+crr[i-2])
    print(crr[-1])

b=input()
cr=list(map(int,input().split()))
func(cr)
Buggy code:
import sys
sample = sys.stdin.read().splitlines()
n, stones = int(sample[0]), list(map(int, sample[1].split()))

def frog_jump(n, stones):
    dp = [float('inf')] * n
    jumps = (1, 2)
    dp[0] = 0
    for idx in range(len(dp)):
        for jump in jumps:
            if idx+jump < len(dp):
                dp[idx+jump] =  min(dp[idx]+abs(stones[idx+jump]-stones[idx]), dp[idx+jump])
    return dp[-1]
 
 frog_jump(n, stones)

Fixed code:
import sys
sample = sys.stdin.read().splitlines()
n, stones = int(sample[0]), list(map(int, sample[1].split()))
dp = [float('inf')] * n
jumps = (1, 2)
dp[0] = 0
for idx in range(len(dp)):
  for jump in jumps:
    if idx+jump < len(dp):
      dp[idx+jump] =  min(dp[idx]+abs(stones[idx+jump]-stones[idx]), dp[idx+jump])
print(dp[-1])
Buggy code:
n = int(input())
h = list(map(int, input().split()))
inf = 10 ** 4 + 1
dp = [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]))
dp[n - 1] = min(dp[n - 1], dp[n - 2] + abs(h[n - 2] - h[i + 1]))
print(dp[n - 1])

Fixed code:
n = int(input())
h = list(map(int, input().split()))
inf = 10 ** 8 + 1
dp = [inf] * 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[n - 1])
Buggy code:
n,k = map(int,input().split())
h = list(map(int,input().split()))
dp = [float("inf")]*n
dp[0] = 0
for i in range(n):
  for j in range(1,k+1):
    if i+j < n:
      dp[i+j] = min(dp[i]+abs(h[i+j]-h[i]),dp[i+j])
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):
  if i+1 < n:
    dp[i+1] = min(dp[i]+abs(h[i+1]-h[i]),dp[i+1])
  if i+2 < n:
    dp[i+2] = min(dp[i]+abs(h[i+2]-h[i]),dp[i+2])
print(dp[-1])
Buggy code:
n = int(input())
a = list(map(int, input().split()))

inf = int(1e9)

dp = [inf]*(n+3)
dp[0] = 0

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

print(dp[n-1])

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

a.append(0); a.append(0);
inf = int(1e9)
dp = [inf]*(n+3)
dp[0] = 0

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

print(dp[n-1])
Buggy code:
def sub():
    N = int(input())
    hs = [int(e) for e in input().split()]
    optimal_values = [None for _ in range(N)]
    optimal_values[0] = 0
    for i in range(1, N):
        if i > 1:
            a = optimal_values[i - 1] + abs(hs[i] - hs[i - 1])
            b = optimal_values[i - 2] + abs(hs[i] - hs[i - 2])
            optimal_values[i] = min(a, b)
        else:
            optimal_values[i] = optimal_values[i - 1] + abs(hs[i] - hs[i - 1])
    print(optimal_values[-1])


Fixed code:
def sub():
    N = int(input())
    hs = [int(e) for e in input().split()]
    optimal_values = [None for _ in range(N)]
    optimal_values[0] = 0
    for i in range(1, N):
        if i > 1:
            a = optimal_values[i - 1] + abs(hs[i] - hs[i - 1])
            b = optimal_values[i - 2] + abs(hs[i] - hs[i - 2])
            optimal_values[i] = min(a, b)
        else:
            optimal_values[i] = optimal_values[i - 1] + abs(hs[i] - hs[i - 1])
    print(optimal_values[-1])


sub()
Buggy code:
n=int(input())
A=[int,input().split()]

dp=list(range(0,n))
dp[0]=0
dp[1]=abs(A[1]-A[0])
for i in range(n-2):
  temp1=dp[i]+abs(A[i+2]-A[i])
  temp2=dp[i+1]+abs(A[i+2]-A[i+1])
  dp[i+2]=min(temp1,temp2)

print(dp[n-1])

Fixed code:
n=int(input())
A=list(map(int,input().split()))
 
dp=list(range(0,n))
dp[0]=0
dp[1]=abs(A[1]-A[0])
for i in range(n-2):
  temp1=dp[i]+abs(A[i+2]-A[i])
  temp2=dp[i+1]+abs(A[i+2]-A[i+1])
  dp[i+2]=min(temp1,temp2)
 
print(dp[n-1])
Buggy code:
def Frog1():
    N = int(input())
    Hs = list(map(int,input().split()))
    dp = [0 for i in range(N)]
    dp[0] = 0
    dp[1] = abs(Hs[1]-Hs[0])
    for i in range(2,N):
        dp[i] = min(abs(Hs[i-1]-Hs[i])+dp[i-1],abs(Hs[i-2]-Hs[i])+dp[i-2])
Frog1()


Fixed code:
def Frog1():
    N = int(input())
    Hs = list(map(int,input().split()))
    dp = [0 for i in range(N)]
    dp[0] = 0
    dp[1] = abs(Hs[1]-Hs[0])
    for i in range(2,N):
        dp[i] = min(abs(Hs[i-1]-Hs[i])+dp[i-1],abs(Hs[i-2]-Hs[i])+dp[i-2])
    print(dp[N-1])
Frog1()
Buggy code:
def dp1(n,h):
    dp=[10^5]*n
    dp[0]=0
    dp[1]=abs(h[1]-h[0])
    for i in range(2,n-1):
        dp[i]=min(dp[i-1]+abs(h[i]-h[i-1]),dp[i-2]+abs(h[i]-h[i-2]))
    return dp[n-1]

n=int(input())
h = list(map(int, input().split()))
print(dp1(n,h))

Fixed code:
def dp1(n,h):
    dp=[10^5]*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]))
    return dp[n-1]

n=int(input())
h = list(map(int, input().split()))
print(dp1(n,h))
Buggy code:

n = int(input())
temp = input()
h = temp.split()
for i,item in enumerate(h):
    h[i] = int(item)
dp = [0]
print(dp)
for i,height in enumerate(h):
    if i >=2:
        step1 = dp[i - 1] + abs(height - h[i-1])
        step2 = dp[i-2] + abs(height - h[i-2])
        dp.append(step1 if step1 <= step2 else step2)
    elif i == 1:
        dp.append(abs(height - h[i-1]))

    print(dp)

print(dp)




Fixed code:

n = int(input())
temp = input()
h = temp.split()
for i,item in enumerate(h):
    h[i] = int(item)
dp = [0]
for i,height in enumerate(h):
    if i >=2:
        step1 = dp[i - 1] + abs(height - h[i-1])
        step2 = dp[i-2] + abs(height - h[i-2])
        dp.append(step1 if step1 <= step2 else step2)
    elif i == 1:
        dp.append(abs(height - h[i-1]))

print(dp.pop())
Buggy code:
def chmin(DP,b,i):
    if (DP[i]> b):
        DP[i] = b
        return True
    return False
N = int(input())
H = [i for i in map(int,input().split())]
dp = [10**5 for i in range(N)]
dp[0] = 0
for i in range(1,N):
    chmin(dp,dp[i-1]+abs(H[i]-H[i-1]),i)
    print(dp)
    if i > 1:
        chmin(dp,dp[i-2]+abs(H[i]-H[i-2]),i)
print(dp[-1])

Fixed code:
def chmin(DP,b,i):
    if (DP[i]> b):
        DP[i] = b
        return True
    return False
N = int(input())
H = [i for i in map(int,input().split())]
dp = [10**10 for i in range(N)]
dp[0] = 0
for i in range(1,N):
    chmin(dp,dp[i-1]+abs(H[i]-H[i-1]),i)
    if i > 1:
        chmin(dp,dp[i-2]+abs(H[i]-H[i-2]),i)
print(dp[-1])
Buggy code:
N = int(input())
*h, = map(int, input().split())
dp = [float("inf") for _ in range(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[N - 1])
B – Frog 2

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

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

print(cost[n-1])
Buggy code:
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-1]), dp[i-1] + abs(h[i] - h[i-1]))
print(dp[-1])

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

dp = []

for i in range(N):
	dp.append(float("inf"))

for i in range(N):
	if i ==0:
		dp[i] = 0
	else:
		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[-1])

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

dp = []

for i in range(N):
	dp.append(float("inf"))

for i in range(N):
	if i ==0:
		dp[i] = 0
	else:
		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[-1])
Buggy code:
N = int( input() )
h = [int(x) for x in input().split()]

dp    = [0]*( len(h) + 1 )
dp[1] = h[0]
dp[2] = h[1]
for ii in range( 3, len(dp) ):
    from_2 = abs(h[ii-1] - h[ii-3])
    from_1 = abs(h[ii-1] - h[ii-2])
    dp[ii] = min( dp[ii-2] + from_2, dp[ii-1] + from_1 )
    
print(dp[-1])

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

dp    = [0]*( len(h) )
dp[0] = 0
dp[1] = abs( h[0] - h[1] )
for ii in range( 2, len(dp) ):
    from_1 = abs(h[ii] - h[ii-1])
    from_2 = abs(h[ii] - h[ii-2])
    dp[ii] = min( dp[ii-1] + from_1, dp[ii-2] + from_2 )
    
print(dp[-1])
Buggy code:
do run python3
n=int(input())
stones=list(map(int, input().split()))
infini=(10**4)*(10**5)
dp = [infini for _ in range(n)]
dp[0]=0

for pos in range(0, n-1):
   dp[pos+1] = min(dp[pos+1], dp[pos] + abs(stones[pos] - stones[pos+1]))
   if pos <= n-3:
      dp[pos+2] = min(dp[pos+2], dp[pos] + abs(stones[pos] - stones[pos+2]))
print(dp[-1])


Fixed code:

n=int(input())
stones=list(map(int, input().split()))
infini=(10**4)*(10**5)
dp = [infini for _ in range(n)]
dp[0]=0

for pos in range(0, n-1):
   dp[pos+1] = min(dp[pos+1], dp[pos] + abs(stones[pos] - stones[pos+1]))
   if pos <= n-3:
      dp[pos+2] = min(dp[pos+2], dp[pos] + abs(stones[pos] - stones[pos+2]))
print(dp[-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(n-2):
    dp[i+2]=min(dp[i+1]+abs(h[i+2]-h[i+1]),dp[i]+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(n-2):
    dp[i+2]=min(dp[i+1]+abs(h[i+2]-h[i+1]),dp[i]+abs(h[i]-h[i+2]))
print(dp[n-1])
Buggy code:
n = int(input())
h = list(map(int,input().split()))
a = [0 for _ in range(n)]
a[1] = abs(h[1]-h[0])
for i in range(2,n):
  a[i] = min(a[i-1]+abs(h[i]-h[i-1]),a[i-2]+abs(h[i]-h[i-2]))
print(a[n])
  
  

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

Fixed code:
n = int(input())
h = list(map(int,input().split()))
inf = float("inf")
dp =[inf 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[-1])
Buggy code:
n = int(input())
h = [int(hi) for hi in input().split()]

inf = float('inf')

dp = [inf] * n

dp[0] = 0

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

print(dp[-1])




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

inf = float('inf')

dp = [inf] * n

dp[0] = 0

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

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

Fixed code:
n=int(input())
arr=(list(map(int,input().split())))
dp=[0]*n
dp[0]=0
dp[1]=abs(arr[1]-arr[0])
for i in range(2,n):
     dp[i]=min(dp[i-2]+abs(arr[i]-arr[i-2]),dp[i-1]+abs(arr[i]-arr[i-1]))
print(dp[n-1])
Buggy code:
# ===================================
# (c) MidAndFeed aka ASilentVoice
# ===================================
# import math 
# import collections
# import string
# ===================================
n = int(input())
q = [int(x) for x in input().split()]
ans = [None for _ in range(n)]
ans[0] = 0

# Top down
def dp(i):
	if i < 0: return 0
	else:
		if ans[i] != None: return ans[i]

		if i-1 >= 0: t1 = ans[i-1] + abs(q[i-1] - q[i])
		if i-2 >= 0: t2 = ans[i-2] + abs(q[i-2] - q[i])
		ans[i] = min(t1, t2)
		
		return ans[i]

dp(n-1)

# Bottom up
# for i in range(1, n):
# 	t1 = t2 = int(1e9)
# 	if i-1 >= 0: t1 = ans[i-1] + abs(q[i-1] - q[i])
# 	if i-2 >= 0: t2 = ans[i-2] + abs(q[i-2] - q[i])
# 	ans[i] = min(t1, t2)

print(ans[n-1])


Fixed code:
# ===================================
# (c) MidAndFeed aka ASilentVoice
# ===================================
# import math 
# import collections
# import string
# ===================================
n = int(input())
q = [int(x) for x in input().split()]
ans = [None for _ in range(n)]
ans[0] = 0

# # Top down
# def dp(current):
# 	if ans[current] != None: return ans[current]

# 	if current < 0: return 0
# 	else:
# 		t1 = t2 = int(1e9)
# 		if current-1 >= 0: t1 = abs(q[current] - q[current-1]) + dp(current-1)
# 		if current-2 >= 0: t2 = abs(q[current] - q[current-2]) + dp(current-2)

# 		ans[current] = min(t1, t2)
# 		return ans[current]

# dp(n-1)

for i in range(1, n):
	t1 = t2 = int(1e9)
	if i-1 >= 0: t1 = ans[i-1] + abs(q[i-1] - q[i])
	if i-2 >= 0: t2 = ans[i-2] + abs(q[i-2] - q[i])
	ans[i] = min(t1, t2)
# print(ans)
print(ans[n-1])
Buggy code:
n=int(input())
arr=list(map(int,input().split()))
vis[0] = 0
if n < 2:
  return 0
vis[1] = abs(arr[0]-arr[1])
for i in range(2, n):
    step_1 = abs(arr[i-1]-arr[i-2]) + vis[i-1]
    step_2 = abs(arr[i-1]-arr[i-3]) + vis[i-2]
    vis[i] = min(step_1, step_2)
   
print(vis[i])

Fixed code:
n=int(input())
arr=list(map(int,input().split()))
if n < 2:
  print(0)
vis = [0] * n
vis[0] = 0
vis[1] = abs(arr[0]-arr[1])
for i in range(2, n):
    step_1 = abs(arr[i]-arr[i-1]) + vis[i-1]
    step_2 = abs(arr[i]-arr[i-2]) + vis[i-2]
    vis[i] = min(step_1, step_2)
print(vis[-1])
Buggy code:
N = int(input())
A = list(map(int, input().split()))
 
INF = 10**9
dp = [0] + [INF]*N
 
for i in range(1,N+1):
    if i == 1:
        dp[1] = abs(A[1]-A[0])
    else:
        dp[i] = min(dp[i-1]+abs(A[i]-A[i-1]), dp[i-2]+abs(A[i]-A[i-2]))
 
print(dp[N])

Fixed code:
N = int(input())
A = list(map(int, input().split()))
 
INF = 10**9
dp = [INF]*N

for i in range(len(A)):
    if i == 0:
        dp[0] = 0
    elif i == 1:
        dp[1] = abs(A[1]-A[0])
    else:
        dp[i] = min(dp[i-1]+abs(A[i]-A[i-1]), dp[i-2]+abs(A[i]-A[i-2]))
 
print(dp[N-1])
Buggy code:
N = int(input())
H_ = list(map(int,input().split()))
def dp_solver(x):
    H = H_
    dp=[float('inf')]*N
    dp[0]=0
    dp[1]=abs(H[1]-H[0])
    for i in range(N-2):
        dp[i+2] = min(dp[i+2],dp[i]+abs(H[i+2]-H[i]))
        dp[i+2] = min(dp[i+2],dp[i+1]+abs(H[i+2]-H[i+1]))
    print(dp)
    return dp[x-1]
print(dp_solver(N))

Fixed code:
N = int(input())
H_ = list(map(int,input().split()))
def dp_solver(x):
    H = H_
    dp=[float('inf')]*N
    dp[0]=0
    dp[1]=abs(H[1]-H[0])
    for i in range(N-2):
        dp[i+2] = min(dp[i+2],dp[i]+abs(H[i+2]-H[i]))
        dp[i+2] = min(dp[i+2],dp[i+1]+abs(H[i+2]-H[i+1]))
    return dp[x-1]
print(dp_solver(N))
Buggy 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)

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())
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]-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=[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]-H[i+2]),dp[i+1]+abs(H[i+2]-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
dp[1] = abs(h[0] - h[1])
h_2 = h[0]
h_1 = h[1]

for i in range(2, N):
    x = h[i]
    dp[i] = min(
        dp[i - 1] + abs(x - h_1),
        dp[i - 2] - abs(x - h_2)
    )
    h_2 = h_1
    h_1 = x
print(dp[-1])


Fixed code:
N = int(input())
h = list(map(int, input().split()))
dp = [float("inf")] * N
dp[0] = 0
dp[1] = abs(h[0] - h[1])
h_2 = h[0]
h_1 = h[1]

for i in range(2, N):
    x = h[i]
    dp[i] = min(
        dp[i - 1] + abs(x - h_1),
        dp[i - 2] + abs(x - h_2)
    )
    h_2 = h_1
    h_1 = x
print(dp[-1])
Buggy code:
n=int(input())
lst=list(map(int,input().split()))
dp=[0]*n
dp[1]=abs(lst[0]-lst[1])
for i in range(2,n):
    dp[i]=min(dp[i-1]+abs(lst[i]-lst[i-1]),dp[i-2]+abs(lst[i]-lst[i-2]))
print(dp[i-1])

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

print(res[-1])


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

print(res[-1])
Buggy code:
N = int(input())
h = list(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+2]-h[i+1])))
  
print(DP[-1])

Fixed code:
N = int(input())
h = list(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])