Buggy python submission (verdict: Time Limit Exceeded):
import math,string,itertools,fractions,heapq,collections,re,array,bisect,sys,random,time,queue,copy

sys.setrecursionlimit(10**7)
inf=10**20
mod=10**9+7
dd=[(-1,0),(0,1),(1,0),(0,-1)]
ddn=[(-1,0),(-1,1),(0,1),(1,1),(1,0),(1,-1),(0,-1),(-1,-1)]

def LI(): return [int(x) for x in sys.stdin.readline().split()]
def LI_(): return [int(x)-1 for x in sys.stdin.readline().split()]
def I(): return int(sys.stdin.readline())
def LS(): return sys.stdin.readline().split()
def S(): return input()

def main():
  dp=[inf for _ in range(10**5+10)]
  dp[0]=0
  n,k=LI()
  l=LI()

  for i in range(n):
    for j in range(1,k+1):
      if i+j<n:
        # print(dp[i],abs(l[i]-l[i+j]))
        dp[i+j]=min(dp[i+j],dp[i]+abs(l[i]-l[i+j]))
    # print(dp[:n])

  return dp[n-1]

# main()
print(main())


Fixed submission:
import math,string,itertools,fractions,heapq,collections,re,array,bisect,sys,random,time

sys.setrecursionlimit(10**7)
inf=10**20
mod=10**9+7

def LI(): return list(map(int,input().split()))
def I(): return int(input())
def LS(): return input().split()
def S(): return input()

def main():
  n,k=LI()
  l=LI()

  dp=[inf]*100010
  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(l[i+j]-l[i]))

  return dp[n-1]

print(main())

Buggy python submission (verdict: Time Limit Exceeded):
import math,string,itertools,fractions,heapq,collections,re,array,bisect,sys,random,time

sys.setrecursionlimit(10**7)
inf=10**20
mod=10**9+7

def LI(): return list(map(int,input().split()))
def I(): return int(input())
def LS(): return input().split()
def S(): return input()

def main():
  n,k=LI()
  l=LI()

  dp=[inf]*100010
  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(l[i]-l[i+j]))

  return dp[n-1]

print(main())


Fixed submission:
import math,string,itertools,fractions,heapq,collections,re,array,bisect,sys,random,time

sys.setrecursionlimit(10**7)
inf=10**20
mod=10**9+7

def LI(): return list(map(int,input().split()))
def I(): return int(input())
def LS(): return input().split()
def S(): return input()

def main():
  n,k=LI()
  l=LI()

  dp=[inf]*100010
  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(l[i+j]-l[i]))

  return dp[n-1]

print(main())

Buggy python submission (verdict: Time Limit Exceeded):
import math,string,itertools,fractions,heapq,collections,re,array,bisect,sys,random,time

sys.setrecursionlimit(10**7)
inf=10**20
mod=10**9+7

def LI(): return list(map(int,input().split()))
def I(): return int(input())
def LS(): return input().split()
def S(): return input()

def main():
  n,k=LI()
  l=LI()

  dp=[inf]*100010
  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(l[i]-l[i+j]))

  return dp[n-1]

print(main())


Fixed submission:
import math,string,itertools,fractions,heapq,collections,re,array,bisect,sys,random,time

sys.setrecursionlimit(10**7)
inf=10**20
mod=10**9+7

def LI(): return list(map(int,input().split()))
def I(): return int(input())
def LS(): return input().split()
def S(): return input()

def main():
  n,k=LI()
  l=LI()

  dp=[inf]*100010
  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(l[i+j]-l[i]))

  return dp[n-1]

print(main())

Buggy python submission (verdict: Runtime Error):
import math,string,itertools,fractions,heapq,collections,re,array,bisect,sys,random,time

sys.setrecursionlimit(10**7)
inf=10**20
mod=10**9+7

def LI(): return list(map(int,input().split()))
def I(): return int(input())
def LS(): return input().split()
def S(): return input()

def main():
  n,k=LI()
  l=LI()

  dp=[inf]*11
  dp[0]=0

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

  return dp[n-1]

print(main())


Fixed submission:
import math,string,itertools,fractions,heapq,collections,re,array,bisect,sys,random,time

sys.setrecursionlimit(10**7)
inf=10**20
mod=10**9+7

def LI(): return list(map(int,input().split()))
def I(): return int(input())
def LS(): return input().split()
def S(): return input()

def main():
  n,k=LI()
  l=LI()

  dp=[inf]*100010
  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(l[i+j]-l[i]))

  return dp[n-1]

print(main())

Buggy python submission (verdict: Time Limit Exceeded):
N,K = map(int,input().split())
H = list(map(int,input().split()))
dp = [10**18]*N
dp[0] = 0
for i in range(1,N):
    for j in range(max(0,i-K),i):
        dp[i] = min(dp[i], dp[j] + abs(H[i]-H[j]))
print(dp[-1])


Fixed submission:
import math,string,itertools,fractions,heapq,collections,re,array,bisect,sys,random,time

sys.setrecursionlimit(10**7)
inf=10**20
mod=10**9+7

def LI(): return list(map(int,input().split()))
def I(): return int(input())
def LS(): return input().split()
def S(): return input()

def main():
  n,k=LI()
  l=LI()

  dp=[inf]*100010
  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(l[i+j]-l[i]))

  return dp[n-1]

print(main())

Buggy python submission (verdict: Time Limit Exceeded):
import math,string,itertools,fractions,heapq,collections,re,array,bisect,sys,random,time

sys.setrecursionlimit(10**7)
inf=10**18
mod=10**9+7

def LI(): return list(map(int,input().split()))
def I(): return int(input())
def LS(): return input().split()
def S(): return input()

def main():
  n,k=LI()
  l=LI()

  dp=[inf]*n
  dp[0]=0
  for i in range(1,n):
    for j in range(max(0,i-k),i):
      dp[i] = min(dp[i], dp[j] + abs(l[i]-l[j]))

  return dp[n-1]

print(main())


Fixed submission:
import math,string,itertools,fractions,heapq,collections,re,array,bisect,sys,random,time

sys.setrecursionlimit(10**7)
inf=10**20
mod=10**9+7

def LI(): return list(map(int,input().split()))
def I(): return int(input())
def LS(): return input().split()
def S(): return input()

def main():
  n,k=LI()
  l=LI()

  dp=[inf]*100010
  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(l[i+j]-l[i]))

  return dp[n-1]

print(main())

Buggy python submission (verdict: Time Limit Exceeded):
import math,string,itertools,fractions,heapq,collections,re,array,bisect,sys,random,time

sys.setrecursionlimit(10**7)
inf=10**20
mod=10**9+7

def LI(): return list(map(int,input().split()))
def I(): return int(input())
def LS(): return input().split()
def S(): return input()

def main():
  n,k=LI()
  l=LI()

  dp=[inf]*n
  dp[0]=0
  for i in range(1,n):
    for j in range(max(0,i-k),i):
      dp[i] = min(dp[i], dp[j] + abs(l[i]-l[j]))

  return dp[n-1]

print(main())


Fixed submission:
import math,string,itertools,fractions,heapq,collections,re,array,bisect,sys,random,time

sys.setrecursionlimit(10**7)
inf=10**20
mod=10**9+7

def LI(): return list(map(int,input().split()))
def I(): return int(input())
def LS(): return input().split()
def S(): return input()

def main():
  n,k=LI()
  l=LI()

  dp=[inf]*100010
  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(l[i+j]-l[i]))

  return dp[n-1]

print(main())

Buggy python submission (verdict: Time Limit Exceeded):
import math,string,itertools,fractions,heapq,collections,re,array,bisect,sys,random,time

sys.setrecursionlimit(10**7)
inf=10**20
mod=10**9+7

def LI(): return list(map(int,input().split()))
def I(): return int(input())
def LS(): return input().split()
def S(): return input()

def main():
  n,k=LI()
  l=LI()

  dp=[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+j],dp[i]+abs(l[i+j]-l[i]))

  return dp[n-1]

print(main())


Fixed submission:
import math,string,itertools,fractions,heapq,collections,re,array,bisect,sys,random,time

sys.setrecursionlimit(10**7)
inf=10**20
mod=10**9+7

def LI(): return list(map(int,input().split()))
def I(): return int(input())
def LS(): return input().split()
def S(): return input()

def main():
  n,k=LI()
  l=LI()

  dp=[inf]*100010
  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(l[i+j]-l[i]))

  return dp[n-1]

print(main())

Buggy python submission (verdict: Time Limit Exceeded):
import math,string,itertools,fractions,heapq,collections,re,array,bisect,sys,random,time

sys.setrecursionlimit(10**7)
inf=10**20
mod=10**9+7

def LI(): return list(map(int,input().split()))
def I(): return int(input())
def LS(): return input().split()
def S(): return input()

def main():
  n,k=LI()
  l=LI()

  dp=[inf]*100010
  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(l[i+j]-l[i]))

  return dp[n-1]

print(main())


Fixed submission:
import math,string,itertools,fractions,heapq,collections,re,array,bisect,sys,random,time

sys.setrecursionlimit(10**7)
inf=10**20
mod=10**9+7

def LI(): return list(map(int,input().split()))
def I(): return int(input())
def LS(): return input().split()
def S(): return input()

def main():
  n,k=LI()
  l=LI()

  dp=[inf]*100010
  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(l[i+j]-l[i]))

  return dp[n-1]

print(main())