qyliang/CodeNanoFix huggingface dataset:
Buggy code:

N = int(input())
H = list(map(int,input().split()))
inf = 10**9+7
dp = [inf] * (N+10)
import numpy as np
for i,h in enumerate(H[:N-1]):
    dp[i+1] = min(dp[i+1],dp[i] + np.abs(h[i]-h[i+1]))
    if i>N-2: dp[i+2] = min(dp[i+2],dp[i] + np.abs(h[i]-h[i+2]))
    
print(dp[N-1])

Fixed code:

N = int(input())
H = list(map(int,input().split()))
inf = 10**9+7
dp = [inf] * (N+10)
dp[0] = 0
import numpy as np
for i,h in enumerate(H[:N-1]):
    dp[i+1] = min(dp[i+1],dp[i] + np.abs(h-H[i+1]))
    if i<N-2: dp[i+2] = min(dp[i+2],dp[i] + np.abs(h-H[i+2]))
    
print(dp[N-1])
Buggy code:
#-*-coding:utf-8-*-

import numpy as np

def main():
    n = int(input())
    ashiba=np.array((input().split()),int)
    dp=np.zeros(n,dtype=int)
    k=2
    for i in range(1,n):
        start=max(0,i-k)
        dp[i]=min(dp[start:i]+abs(ashiba[i]-ashiba[start:i]))
    print(dp[N-1])

if __name__ == "__main__":
    main()

Fixed code:
#-*-coding:utf-8-*-
import numpy as np
 
def main():
    n = int(input())
    ashiba=np.array((input().split()),int)
    dp=np.zeros(n,dtype=int)
    k=2
    for i in range(1,n):
        start=max(0,i-k)
        dp[i]=min(dp[start:i]+abs(ashiba[i]-ashiba[start:i]))
    print(dp[n-1])
 
if __name__ == "__main__":
    main()
Buggy code:
n = int(input())
h = [int(e) for e in input().split()]

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

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

print(dp[-1])

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

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

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

print(dp[-1])
Buggy code:
n,*h=map(int,open(0).read().split())
dp=[0]*(n+1)
dp[0]=h[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,*h=map(int,open(0).read().split())
dp=[10**18]*(n+1)
dp[0]=0
h=h+[0]
for i in range(n-1):
  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())
h = list(map(int,input().split()))


dp = [99999999]*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:
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]))
print(dp[-1])
Buggy code:
N = int(input())
a = list(map(int, input().split()))

dp = []
def mins(minval, val):
  if minval < val:
    return minval
  else:
    return val
for i in range(N):

  dp.append(10000000)
for i in range(len(a)):

  if i == 0:
    dp[0] = 0

  if i == 1:

    dp[1]= a[1] - a[0]

  dp[i] = min(dp[i], dp[i-1] + abs(a[i-1] - a[i]))
  dp[i] = min(dp[i], dp[i-2] + abs(a[i-2] - a[i]))
  
print(dp[N-1])  

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

def mins(minval, val):
	if minval < val:
			return minval
	else:
			return val

for i in range(N):
	dp.append(1000000000000)

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

dp = [10**5]*N
for i in range(N):
    if i+1 <= N-1:
        dp[i+1] = min(dp[i+1], dp[i]+abs(H[i+1]-H[i]))
    if i+2 <= N-1:
        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 = [10**9]*N
dp[0] = 0
for i in range(N):
    if i+1 <= N-1:
        dp[i+1] = min(dp[i+1], dp[i]+abs(H[i+1]-H[i]))
    if i+2 <= N-1:
        dp[i+2] = min(dp[i+2], dp[i]+abs(H[i+2]-H[i]))
print(dp[N-1])
Buggy 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[1] - h[0])
    else:
        dp[i] = min(abs(h[i] - h[i-1]), abs(h[i] - h[i-2]))
print(dp[N-1])


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[1] - h[0])
    else:
        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())
h = list(map(int, input().split()))

DP = [10**10 for _ in range(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-1]-h[i]), DP[i-2]+abs(h[i-2]-h[i]))
#print(DP)
print(DP[N-1])

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

DP = [10**10 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-1]+abs(h[i-1]-h[i]), DP[i-2]+abs(h[i-2]-h[i]))
#print(DP)
print(DP[N-1])
Buggy code:
N = int(input())
h = list(map(int, input().split()))
x = [0] * N
x[1] = x[0] + abs(h[1] - h[0])
for i in range(2, N):
    x[i] = min(x[i - 1] + abs(h[i] - h[i - 1]),
               x[i - 2] + abs(h[i] - h[i - 2]))
print(x)


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


if __name__ == "__main__":
    N = int(input())
    h = list(map(int, input().split()))
    INF = 10 ** 10
    dp = [INF] * 100010
    dp[0] = 0
    for i in range(N):
        dp[i + 1] = ch_min(dp[i], dp[i] + abs(h[i] - h[i - 1]))
        if (i > 1):
            dp[i + 2] = ch_min(dp[i], dp[i] + abs(h[i] - h[i - 2]))
    print(dp[N - 1])


Fixed code:
def ch_min(a, b):
    if (a > b):
        a = b
    return a


if __name__ == "__main__":
    N = int(input())
    h = list(map(int, input().split()))
    INF = 10 ** 10
    dp = [INF] * 100010
    dp[0] = 0
    for i in range(1, N):
        dp[i] = ch_min(dp[i], dp[i - 1] + abs(h[i] - h[i - 1]))
        if (i > 1):
            dp[i] = ch_min(dp[i], dp[i - 2] + abs(h[i] - h[i - 2]))
    print(dp[N - 1])
Buggy code:
def main():
    N = int(input())
    H = [int(x) for x in input().split()]
    inf=float("inf")
    DP = [float("inf")]*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]-H[i-1]),DP[i-2]+abs(H[i]-H[i-2]))
    
    print(DP[-1])

if __name__ == "__main__":
    main()
    pass

Fixed code:
def main():
    N = int(input())
    H = [int(x) for x in input().split()]
    DP = [float("inf")]*N
    DP[0] = 0

    for i in range(1,N):
        if i == 1:
            DP[i] = DP[i-1]+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[-1])

if __name__ == "__main__":
    main()
    pass
Buggy code:
N = int(input())
h = [int(i) for i in input().split()]
dp = [0 for i in range(N)]
dp[1]= abs(h[1]-h[0])
for i in range(2,N):
    print(dp)
    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 = [int(i) for i in input().split()]
dp = [0 for i in range(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())
hlis = list(map(int, input().split()))
dp = [0] + [float('inf')]*(n-1)
for i in range(n-2):
    one = abs(hlis[i]-hlis[i+1])
    two = abs(hlis[i]-hlis[i+2])
    dp[i+1] = min(dp[i]+one, dp[i+1])
    dp[i+2] = min(dp[i]+two, dp[i+2])
print(dp[n-1])

Fixed code:
n = int(input())
hlis = list(map(int, input().split()))
dp = [0] + [float('inf')]*n
dp[1] = dp[0] + abs(hlis[0])
for i in range(1, n):
    one = abs(hlis[i]-hlis[i-1])
    two = abs(hlis[i]-hlis[i-2])
    dp[i] = min(dp[i-1]+one, dp[i-2]+two)
print(dp[n-1])
Buggy code:
N = int(input())
h_s = list(map(int, input().split()))
h_s = [abs(h_s[0]-h) for h in h_s]+[0]*10
# print(h_s)
dp = [float("inf")]*(N+10)
dp[0] = 0

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


Fixed code:
N = int(input())
h_s = list(map(int, input().split()))+[0]*10
# print(h_s)
dp = [float("inf")]*(N+10)
dp[0] = 0

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

print(dp[N-1])
Buggy code:
def chmin(a,b):
  if(a <= b):
    return a
  else:
    return b

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


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

INF = sum(h) + 1

ans = [INF for i in range(n)]

ans[0] = 0
ans[1] = h[1] - h[0]

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

print(ans[n-1])

Fixed code:
def chmin(a,b):
  if(a <= b):
    return a
  else:
    return b

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


n = int(input())
h = list(map(int,input().split()))
INF = sum(h)+100

dp = [INF for i in range(n)]

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

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

print(dp[n-1])
Buggy code:
import os
import sys

N = int(sys.stdin.readline().strip())
cost_list = list(map(int, sys.stdin.readline().strip()))
dp = [10**9 for _ in range(N)]
dp[0] = 0
dp[1] = abs(cost_list[1] - cost_list[0])

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

print(dp[N-1])

Fixed code:
import sys

N = int(sys.stdin.readline().strip())
cost_list = list(map(int, sys.stdin.readline().strip().split(" ")))
dp = [10**9 for _ in range(N)]
dp[0] = 0
dp[1] = abs(cost_list[1] - cost_list[0])

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

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

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

pos = 0

cost = [0]

for i in range(1,N):
  back_1 = abs(h_list[i] - h_list[i-1])
  if i>1:
    back_2 = abs(h_list[i] - h_list[i-2])
  if i>1:
    cost.append( back_2 if back_1 > back_2 else back_1)
  else:
    cost.append( back_1)
  
print(cost[N-1])

Fixed code:
N=int(input())

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

pos = 0

cost = [0]

for i in range(1,N):
  back_1 = abs(h_list[i] - h_list[i-1])
  if i>1:
    back_2 = abs(h_list[i] - h_list[i-2])
  if i>1:
    cost.append( (back_2 + cost[i-2] )if (back_1 + cost[i-1]) > (back_2 + cost[i-2] ) else (back_1 + cost[i-1]))
  else:
    cost.append( back_1 + cost[i-1])
    
  
print(cost[N-1])
Buggy code:
def cmin(a,b):
    if a>b:
        return b
    else:
        return a

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

dp[] = [0] + [float("inf")]*(N-1)
for i in range(N-2):
    dp[i] = cmin(dp[i],dp[i-1]+abs(h[i-1]-h[i]))
print(dp[-1])

Fixed code:
def cmin(a,b):
    if a>b:
        return b
    else:
        return a
 
N = int(input())
h = list(map(int,input().split()))
 
dp = [0] + [float("inf")]*(N-1)
dp[1]=abs(h[1]-h[0])
for i in range(2,N):
    dp[i] = cmin(dp[i-2]+abs(h[i]-h[i-2]),dp[i-1]+abs(h[i]-h[i-1]))
print(dp[-1])
Buggy code:
def frog1(h):
    dp = [float('inf')]*3
    dp[0] = 0
    for i in range(1,len(h)):
        dp[i%3] = min([dp[(i-j)%3] + abs(h[i]-h[i-j]) for j in range(1,3)])
    return dp[(len(h)-1)%3]
    
n = raw_input()
vals = map(int, raw_input.split())

print(frog1(vals))

Fixed code:
def frog1(h):
    dp = [float('inf')]*3
    dp[0] = 0
    for i in range(1,len(h)):
        dp[i%3] = min([dp[(i-j)%3] + abs(h[i]-h[i-j]) for j in range(1,3)])
    return dp[(len(h)-1)%3]
    
n = input()
vals = list(map(int, input().split()))

print(frog1(vals))
Buggy code:
import math


def inputIntList():
    return [int(s) for s in input().split()]


def inputInt():
    return int(input())


def main():
    N = inputInt()
    h = inputIntList()
    dp = [math.inf for _ in range(N)]
    dp[0] = 0
    for i in range(N - 2):
        if abs(h[i] - h[i + 1]) + dp[i] < dp[i + 1]:
            dp[i + 1] = abs(h[i] - h[i + 1]) + dp[i]

        if abs(h[i] - h[i + 2]) + dp[i] < dp[i + 2]:
            dp[i + 2] = abs(h[i] - h[i + 2]) + dp[i]
    
    return dp[N-1]


if __name__ == "__main__":
    print(main())


Fixed code:
import math


def inputIntList():
    return [int(s) for s in input().split()]


def inputInt():
    return int(input())


def main():
    N = inputInt()
    h = inputIntList()
    h.append(0)
    dp = [float("inf") for _ in range(N + 2)]
    dp[0] = 0
    for i in range(N - 1):
        if abs(h[i] - h[i + 1]) + dp[i] < dp[i + 1]:
            dp[i + 1] = abs(h[i] - h[i + 1]) + dp[i]

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

    return dp[N - 1]


if __name__ == "__main__":
    print(main())
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,1):
  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,1):
    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())
a = list(map(int, input().split()))

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

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

dp = [0]*n
for i in range(n):
    if i >= 2:
        dp[i] = min(dp[i-1]+abs(a[i]-a[i-1]), dp[i-2]+abs(a[i]-a[i-2]))
    elif i == 1:
        dp[i] = abs(a[i]-a[i-1])
print(dp[-1])
Buggy code:
n = int(input())
l = list(map(int, input().split()))
l1 = [0]*n
for i in range(1,n):
  l1[i] = min(l[i], abs(l[i]-l[i-1]))
print(l)

Fixed code:
n = int(input())
l = list(map(int, input().split()))
l1 = [0]*n
l1[1] = abs(l[0] - l[1])
for i in range(2, n):
    l1[i] = min(l1[i - 2] + abs(l[i] - l[i - 2]), l1[i - 1] + abs(l[i] - l[i - 1]))
print(l1[n - 1])
Buggy code:
import sys


def rec(i):
    #if(i==0):print(i,H[i])
    #if(i>=1):print(i,H[i],H[i-1])
    #if(i>=2):print(i,H[i],H[i-2])
    print(i)
    if (dp[i] < float('inf')): return dp[i]
    if(i==0): return 0

    res = float('inf')
    res = rec(i-1)+abs(H[i]-H[i-1])
    if(i==1): return res

    calc = rec(i-2)+abs(H[i]-H[i-2])
    if(res > calc):
        res = calc

    dp[i] = res

    return res

N = int(input())
H = list(map(int,input().split()))
dp = [float('inf')]*N

#print(N)
#print(H)

print(rec(N-1))

#7
#2 9 4 5 1 6 10


Fixed code:
import sys
sys.setrecursionlimit(10 ** 9)

INF = float('inf')

def rec(i: int):
    #if(i==0):print(i,H[i])
    #if(i>=1):print(i,H[i],H[i-1])
    #if(i>=2):print(i,H[i],H[i-2])
    if dp[i] < INF:
        return dp[i]

    if i==0: return 0
    res = INF

    res = min(res, rec(i-1)+abs(H[i]-H[i-1]))

    if i > 1:
        res = min(res,rec(i-2)+abs(H[i]-H[i-2]))

    dp[i] = res
    return dp[i]

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

dp = [INF] * (N+2)

print(rec(N-1))

#7
#2 9 4 5 1 6 10
Buggy code:
import sys


N = int(input())

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

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

dp[0] = 0
#print(N)
#print(H)
#print(dp)


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

print(dp[-1])

#7
#2 9 4 5 1 6 10


Fixed code:
import sys


N = int(input())

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

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

dp[0] = 0
#print(N)
#print(H)
#print(dp)


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

print(dp[-1])

#7
#2 9 4 5 1 6 10
Buggy code:
# Vicfred
# https://atcoder.jp/contests/dp/tasks/dp_a
# dynamic programming
n = int(input())
h = [0]+list(map(int, input().split()))

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

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



Fixed code:
# Vicfred
# https://atcoder.jp/contests/dp/tasks/dp_a
# dynamic programming
n = int(input())
h = [0]+list(map(int, input().split()))

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

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

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

INF=2**23
dp=[INF]*(N+1)
dp[0]=0
dp[1]=0

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

print(dp[N])


Fixed code:
#  frog

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

INF=2**50
dp=[INF]*(N+1)
dp[0]=0
dp[1]=0

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

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

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

dp[2]=h[2]-h[1]
for i in range(3,n+1):
  jump1=dp[i-2]+abs(h[i-2]-h[i])
  jump2=dp[i-1]+abs(h[i-1]-h[i])
  dp[i]=min(jump1,jump2)

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):
  jump1=dp[i-2]+abs(h[i-2]-h[i])
  jump2=dp[i-1]+abs(h[i-1]-h[i])
  dp[i]=min(jump1,jump2)

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







    

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

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

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

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

print(cost[-1])
Buggy code:
a=int(input())
b=list(map(int,input().split()))

c=[0,abs(b[0]-b[1])]
for i in range(2,a):
  d=min(c[i-2]+abs(b[i-2]-b[i]),c[i-1]+abs(b[i-1]-b[i]))
  c.append(d)
print(c)

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

c=[0,abs(b[0]-b[1])]
for i in range(2,a):
  d=min(c[i-2]+abs(b[i-2]-b[i]),c[i-1]+abs(b[i-1]-b[i]))
  c.append(d)
print(c[a-1])
Buggy code:
import math
n = int(input())
h = list(map(int,input().split(' ')))
'''
n-=1
inf = int(1e9+5)

dp = {}
def frog1(i):
    if i==n:
        return 0
    if i in dp:
        return dp[i]
    
    a = 0
    b = 0
    if i+1>n:
        a = inf
    else:
        a = frog1(i+1)+abs(h[i]-h[i+1])

    if i+2>n:
        b = inf
    else:
        b = frog1(i+2)+abs(h[i]-h[i+2])
    dp[i] = min(a,b)
    return dp[i]
'''
def solve(n,h):
    dp = [0]*n
    for i in reversed(range(0,n-1)):
        if i==n-1:
            dp[i] = 0
        else:
            a = 0
            b = 0
            if i+1<=n-1:
                a = dp[i+1]+abs(h[i]-h[i+1])
            if i+2<=n-1:
                b = dp[i+2]+abs(h[i]-h[i+2])  
            dp[i] = min(a,b)
    return dp[0]
print(solve(n,h))


Fixed code:
import math
n = int(input())
h = list(map(int,input().split(' ')))
'''
n-=1
inf = int(1e9+5)

dp = {}
def frog1(i):
    if i==n:
        return 0
    if i in dp:
        return dp[i]
    
    a = 0
    b = 0
    if i+1>n:
        a = inf
    else:
        a = frog1(i+1)+abs(h[i]-h[i+1])

    if i+2>n:
        b = inf
    else:
        b = frog1(i+2)+abs(h[i]-h[i+2])
    dp[i] = min(a,b)
    return dp[i]
'''
def solve(n,h):
    dp = [0]*n
    for i in reversed(range(0,n-1)):
        if i==n-1:
            dp[i] = 0
        else:
            if i==n-2:
                dp[i] = abs(h[n-1]-h[n-2])
                continue
            a = 0
            b = 0
            if i+1<=n-1:
                a = dp[i+1]+abs(h[i]-h[i+1])
            if i+2<=n-1:
                b = dp[i+2]+abs(h[i]-h[i+2])  
            dp[i] = min(a,b)
    return dp[0]
print(solve(n,h))
Buggy code:
N = int(input())
*h, = map(int, input().split())

dp = [0] * N
dp[1] = h[1] - h[0]
for i in range(2, N):
    c1, c2 = abs(h[i - 1] - h[i]) + dp[i - 1], abs(h[i - 2] - h[i]) + dp[i - 2]
    if c1 < c2:
        dp[i] = c1
    else:
        dp[i] = c2

print(dp[N - 1])


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

dp = [0] * N
dp[1] = abs(h[1] - h[0])
for i in range(2, N):
    c1, c2 = abs(h[i - 1] - h[i]) + dp[i - 1], abs(h[i - 2] - h[i]) + dp[i - 2]
    if c1 < c2:
        dp[i] = c1
    else:
        dp[i] = c2

print(dp[N - 1])
Buggy code:
N = int(input())
H = list(map(int,input().split()))
dp = [0] * N
dp[0] = 0
for i in range(1, N):
    if i == 1:
        dp[i] = abs(H[1] - H[0])
    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[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, k = map(int, input().split())
 
h = list(map(int, input().split()))
 
dp = [1000000000] * 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+j], (dp[i] + abs(h[i] - h[i+j])))
 
print(dp[n-1])

Fixed code:


n = int(input())

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

dp = [1000000000] * n
dp[0] = 0
for i in range(n):
    for j in [1, 2]:
        if i+j < n:
            dp[i+j] = min(dp[i+j], (dp[i] + abs(h[i] - h[i+j])))

print(dp[n-1])
Buggy code:
from sys import stdin
def ch_max(dp_i, dp_i_1):
    if dp_i < dp_i_1:
        dp_i = dp_i_1
    return dp_i
def chmin(dp_i, dp_i_1):
    if dp_i > dp_i_1:
        dp_i = dp_i_1
    return dp_i
n = int(stdin.readline().rstrip())
h = [int(x) for x in stdin.readline().rstrip().split()]

if n == 2:
    print(abs(h[0] - h[1]))
    exit()
dp = []
dp1[0] = 0
dp[1] = abs(h[0] - h[1])
for i in range(n - 2):
    dp[i + 2] = float('inf')
    dp[i + 2] = chmin(dp[i + 2],dp[i + 1] + abs(h[i + 2] - h[i + 1]))
    dp[i + 2] = chmin(dp[i + 2],dp[i] + abs(h[i + 2] - h[i]))
print(dp[n - 1])



Fixed code:
from sys import stdin
def ch_max(dp_i, dp_i_1):
    if dp_i < dp_i_1:
        dp_i = dp_i_1
    return dp_i
def chmin(dp_i, dp_i_1):
    if dp_i > dp_i_1:
        dp_i = dp_i_1
    return dp_i
n = int(stdin.readline().rstrip())
h = [int(x) for x in stdin.readline().rstrip().split()]

if n == 2:
    print(abs(h[0] - h[1]))
    exit()
dp = [float('inf')] * n
dp[0] = 0
dp[1] = abs(h[0] - h[1])
for i in range(n - 2):
    dp[i + 2] = chmin(dp[i + 2],dp[i + 1] + abs(h[i + 2] - h[i + 1]))
    dp[i + 2] = chmin(dp[i + 2],dp[i] + abs(h[i + 2] - h[i]))
print(dp[n - 1])