Buggy python submission (verdict: Time Limit Exceeded):
h,k=list(map(int,input().split()))
def bupdp(l,h,k):
    dp=[0]*(h+1)
    dp[0] = 0
    for i in range(0,h):
        if i>k:
            mini = 999999999
            for j in range(1,k+1):
                mini = min(mini,dp[i-j]+abs(l[i]-l[i-j]))                
            dp[i] = mini

        if i<=k:
            minim = 999999999
            for j in range(1,i+1):
                minim = min(minim,dp[i-j]+abs(l[i]-l[i-j])) 
            dp[i] = minim
        if i<1:
            dp[i] = 0
    return dp[-2]

l = list(map(int,input().split()))
print(bupdp(l,h,k))

Fixed submission:
h,k=list(map(int,input().split()))
def bupdp(l,h,k):
    dp=[0]*(h+1)
    dp[0] = 0
    for i in range(0,h):
        if i>k:
            mini = min([dp[i-j]+abs(l[i]-l[i-j]) for j in range(1,k+1)])             
            dp[i] = mini
        if i<=k and i!=0:
            minim = min([dp[i-j]+abs(l[i]-l[i-j]) for j in range(1,i+1)])
            dp[i] = minim
        if i<1:
            dp[i] = 0
    return dp[-2]

l = list(map(int,input().split()))
print(bupdp(l,h,k))

Buggy python submission (verdict: Time Limit Exceeded):
h,k=list(map(int,input().split()))
def bupdp(l,h,k):
    dp=[0]*(h+1)
    dp[0] = 0
    for i in range(0,h):
        if i>k:
            mini = 999999999
            for j in range(1,k+1):
                mini = min(mini,dp[i-j]+abs(l[i]-l[i-j]))                
            dp[i] = mini

        if i<=k:
            minim = 999999999
            for j in range(1,i+1):
                minim = min(minim,dp[i-j]+abs(l[i]-l[i-j])) 
            dp[i] = minim
        if i<1:
            dp[i] = 0
    return dp[-2]

l = list(map(int,input().split()))
print(bupdp(l,h,k))

Fixed submission:
h,k=list(map(int,input().split()))
def bupdp(l,h,k):
    dp=[0]*(h+1)
    dp[0] = 0
    for i in range(0,h):
        if i>k:
            mini = min([dp[i-j]+abs(l[i]-l[i-j]) for j in range(1,k+1)])             
            dp[i] = mini
        if i<=k and i!=0:
            minim = min([dp[i-j]+abs(l[i]-l[i-j]) for j in range(1,i+1)])
            dp[i] = minim
        if i<1:
            dp[i] = 0
    return dp[-2]

l = list(map(int,input().split()))
print(bupdp(l,h,k))

Buggy python submission (verdict: Time Limit Exceeded):
h,k=list(map(int,input().split()))

def bupdp(l,h,k):
    dp=[0]*(h+1)
    dp[0] = 0
    for i in range(0,h):
        if i>k:
            mini = 999999999
            for j in range(1,k+1):
                mini = min(mini,dp[i-j]+abs(l[i]-l[i-j]))                
            dp[i] = mini

        if i<=k:
            minim = 999999999
            for j in range(1,i+1):
                minim = min(minim,dp[i-j]+abs(l[i]-l[i-j])) 
            dp[i] = minim
        # if i==1:
            # dp[i] = abs(l[i]-l[i-1])
        if i<1:
            dp[i] = 0   
    # print(dp)
    return dp[-2]

l = list(map(int,input().split()))
print(bupdp(l,h,k))


Fixed submission:
h,k=list(map(int,input().split()))
def bupdp(l,h,k):
    dp=[0]*(h+1)
    dp[0] = 0
    for i in range(0,h):
        if i>k:
            mini = min([dp[i-j]+abs(l[i]-l[i-j]) for j in range(1,k+1)])             
            dp[i] = mini
        if i<=k and i!=0:
            minim = min([dp[i-j]+abs(l[i]-l[i-j]) for j in range(1,i+1)])
            dp[i] = minim
        if i<1:
            dp[i] = 0
    return dp[-2]

l = list(map(int,input().split()))
print(bupdp(l,h,k))