Buggy python submission (verdict: Runtime Error):
import sys
input = sys.stdin.readline

import numpy as np

def main():
    #1:初期化
    N,W = map(int,input().split())
    wv = []
    for _ in range(N):
        wv.append(list(map(int,input().split())))
    dp = np.zeros((W+1,N+1), dtype=int)
    #dp = [[0]*(W+1) for i in range(N+1)]

    #print(wv)
    #print(dp)
    #2:初期値(元からゼロなので記述無し)

    #3:dp実行部(貰うDP)
    for i in range(1,N+1):
        for j in range(1,W+1):
            if wv[i-1][0] <= j:
                dp[i][j] = max(dp[i-1][j], dp[i-1][j-wv[i-1][0]]+wv[i-1][1])
            else:
                dp[i][j] = dp[i-1][j]
            #print(i,j)
            #print(*dp,sep="\n")

    #4:出力
    print(dp[N][W])

if __name__ == '__main__':
    main()

Fixed submission:
#1:初期化
N = int(input())
h = list(map(int, input().split()))
inf = float("inf")
dp = [inf]*(N)

#2:初期値
dp[0] = 0

#3:dp実行部
for i in range(1,N):
    dp[i] = min(dp[i], dp[i-1] + abs(h[i] - h[i-1]))
    if(i>1): #2つ目の足場には二個前の足場がないので．
        dp[i] = min(dp[i], dp[i-2] + abs(h[i] - h[i-2]))

#4:出力
print(dp[N-1])

Buggy python submission (verdict: Runtime Error):
def main():
  #1:初期化
  N, K = map(int,input().split())
  h = list(map(int, input().split()))
  #print(h,H)
  inf = float("inf")
  dp = [inf]*(N)

  #2:初期値
  dp[0] = 0

  #3:dp実行部(配るDP)
  for i in range(N):
      for k in range(1,min(N-i-1,K)+1):
          dp[i+k] = min(dp[i+k], dp[i] + abs(h[i] - h[i+k]))
          #print(dp,i,k)

  #4:出力
  print(dp[N-1])

if __name__ == '__main__':
    main()

Fixed submission:
#1:初期化
N = int(input())
h = list(map(int, input().split()))
inf = float("inf")
dp = [inf]*(N)

#2:初期値
dp[0] = 0

#3:dp実行部
for i in range(1,N):
    dp[i] = min(dp[i], dp[i-1] + abs(h[i] - h[i-1]))
    if(i>1): #2つ目の足場には二個前の足場がないので．
        dp[i] = min(dp[i], dp[i-2] + abs(h[i] - h[i-2]))

#4:出力
print(dp[N-1])

Buggy python submission (verdict: Runtime Error):
#1:初期化
N = int(input())
a = [None]*N
for i in range(N):
    a[i] = list(map(int,input().split()))
dp = [[0]*3 for _ in range (N+1)]
#print(dp, sep="\n")
#print(a, sep="\n")

#2:初期値(元からゼロなので記述無し)

#3:dp実行部(貰うDP)
for i in range(1,N+1):
    for j in range(3):
        for k in range(3):
            if(j == k):
                continue
            dp[i][j] = max(dp[i][j], dp[i-1][k]+a[i-1][j]) #dpは[1]からだが，aは[0]からに注意

#4:出力
dpmax = 0
for i in range(3):
    dpmax= max(dp[N][i], dpmax)
#print(*dp, sep="\n")
print(dpmax)


Fixed submission:
#1:初期化
N = int(input())
h = list(map(int, input().split()))
inf = float("inf")
dp = [inf]*(N)

#2:初期値
dp[0] = 0

#3:dp実行部
for i in range(1,N):
    dp[i] = min(dp[i], dp[i-1] + abs(h[i] - h[i-1]))
    if(i>1): #2つ目の足場には二個前の足場がないので．
        dp[i] = min(dp[i], dp[i-2] + abs(h[i] - h[i-2]))

#4:出力
print(dp[N-1])

Buggy python submission (verdict: Runtime Error):
import sys
input = sys.stdin.readline
 
N,K = map(int,input().split())
H = [int(x) for x in input().split()]
 
def main(N,K,H):
    dp = [0]*N
    for i in range(1,N):
        L = [dp[j]+abs(H[i]-H[j]) for j in range(max(0,i-K),i)]
        dp[i] = min(L)
    print(dp[-1])
main(N,K,H)

Fixed submission:
#1:初期化
N = int(input())
h = list(map(int, input().split()))
inf = float("inf")
dp = [inf]*(N)

#2:初期値
dp[0] = 0

#3:dp実行部
for i in range(1,N):
    dp[i] = min(dp[i], dp[i-1] + abs(h[i] - h[i-1]))
    if(i>1): #2つ目の足場には二個前の足場がないので．
        dp[i] = min(dp[i], dp[i-2] + abs(h[i] - h[i-2]))

#4:出力
print(dp[N-1])

Buggy python submission (verdict: Runtime Error):
#1:初期化
N, K = map(int,input().split())
h = list(map(int, input().split()))
inf = float("inf")
dp = [inf]*(N) #Kが100までなので余分に入れて安全！

#2:初期値
dp[0] = 0

#3:dp実行部(配るDP)
for i in range(N):
    for k in range(1,min(N-i-1,K)+1):
        dp[i+k] = min(dp[i+k], dp[i] + abs(h[i] - h[i+k]))
        #print(dp,i,k)

#4:出力
print(dp[N-1])


Fixed submission:
#1:初期化
N = int(input())
h = list(map(int, input().split()))
inf = float("inf")
dp = [inf]*(N)

#2:初期値
dp[0] = 0

#3:dp実行部
for i in range(1,N):
    dp[i] = min(dp[i], dp[i-1] + abs(h[i] - h[i-1]))
    if(i>1): #2つ目の足場には二個前の足場がないので．
        dp[i] = min(dp[i], dp[i-2] + abs(h[i] - h[i-2]))

#4:出力
print(dp[N-1])