Harryxun/testdata huggingface dataset:
Buggy python submission (verdict: Runtime Error):
s = input() + "T"
x, y = map(int, input().split())
n = len(s)

tmp = n 
for i in range(n):
    if s[i] == "T":
        tmp = i
        break
    x -= 1
    
up_down = False
cnt = 0
ud =[]
lr = []
for i in range(tmp, n):
    if s[i] == "T":
        if up_down and cnt != 0:
            ud.append(cnt)
        if not up_down and cnt != 0:
            lr.append(cnt)
        cnt = 0
        up_down = not up_down
    else:
        cnt += 1

def is_subset_sum(array, k, x_y):
    if (k + x_y) % 2 != 0:
        return False
    MOD = 10**9 + 1
    n = len(array)

    # dp[i][j] := i番目までを選んだときにsumがjになるかどうか
    dp = [[False] * (k + 1) for i in range(n + 1)]
    dp[0][0] = True

    for i in range(n):
        for j in range(k + 1):
            if j - array[i] < 0:
                dp[i + 1][j] = dp[i][j]
            else:
                dp[i + 1][j] = dp[i][j] or dp[i][j - array[i]]

    return dp[n][abs(k + x_y)//2]


if is_subset_sum(lr, sum(lr), x) and is_subset_sum(ud, sum(ud), y):
    print("Yes")
else:
    print("No")

Fixed submission:
s = input()
x,y = map(int,input().split())

muki = "plus_x"

#info[muki][kaisu]

info=[["plus_x",0]]
count = 0
for i in range(len(s)):
  if s[i]=="F":
    if muki == "plus_x":
      info[0][1] += 1
    else:
      info[count][1] +=1
      
  if s[i] =="T":
    if muki =="plus_x" or muki=="x":
      muki ="y"
      info.append(["y",0])
      count += 1
    elif muki =="y":
      muki ="x"
      info.append(["x",0])
      count += 1
      
#print(info)
x_set=set([info[0][1]])
y_set=set([0])

for i in range(1,count+1):
  if info[i][0]=="x":
    x_set = set(map(lambda x: x+info[i][1], x_set))|set(map(lambda x: x-info[i][1], x_set))
  if info[i][0]=="y":
    y_set = set(map(lambda y: y+info[i][1], y_set))|set(map(lambda y: y-info[i][1], y_set))

if (x in x_set) and (y in y_set):
  print("Yes")
else:
  print("No")
Buggy python submission (verdict: Runtime Error):
goal = 'AKIHABARA'
s = input()
if s[-1] != "A":
    s += "A"

i = 0
j = 0
while True:
    if j == len(goal):
        break
    if s[i] == goal[j]:
        i += 1
        j += 1
    elif s[i] != goal[j]:
        j += 1
if i == len(s):
    print("YES")
else:
    print("NO")

Fixed submission:
s = input()
for i in range(2):
    for j in range(2):
        for k in range(2):
            for l in range(2):
                tmp = "A"[:i] + "KIH" + "A"[:j] + "B" + "A"[:k]+ "R" + "A"[:l]
                if tmp == s:
                    print("YES")
                    exit()
print("NO")
Buggy python submission (verdict: Time Limit Exceeded):
s = input()
n = len(s)
INF = 10**9

alph = "abcdefghijklmnopqrstuvwxyz"
to_int = {v: i for i, v in enumerate(alph)}
dp = [INF]*(n+1)
dp[0] = 0

for i in range(n):
    tmp = 0
    for j in range(i+1)[::-1]:
        tmp ^= 1 << to_int[s[j]]
        if bin(tmp).count("1") <= 1:
            dp[i+1] = min(dp[j] + 1, dp[i+1])
print(dp[-1])

Fixed submission:
s = input()
n = len(s)
INF = 10**9

alph = "abcdefghijklmnopqrstuvwxyz"
to_int = {v: i for i, v in enumerate(alph)}
dp = {}
all_state = 0

for i in range(n):
    all_state ^= 1 << to_int[s[i]]
    if all_state not in dp:
        dp[all_state] = i + 1
    for j in range(26):
        bit = all_state ^ (1 << j)
        if bit in dp:
            dp[all_state] = min(dp[bit] + 1, dp[all_state])
    if bin(all_state).count("1") <= 1:
        dp[all_state] = 1
print(dp[all_state])
Buggy python submission (verdict: Runtime Error):
h,w = map(int,input().split())
s =[input() for i in range(h)]


for i in range(h):
  for j in range(w):
    count = 0 
    if s[i][j]==".":
      for k in [[0,1],[1,0],[-1,0],[0,-1],[1,1],[-1,-1],[1,-1],[-1,1]]:
        if 0<=k[0]+i<h and  0<=k[1]+j<w:
          if s[k[0]+i][k[1]+j]=="#":
            count = count +1
      s[i] = s[i][0:j]+str(count)+s[i][j+1:w]
      
for i in range(h):
  for j in range(w):
    print(s[i][j], end="")
  h,w = map(int,input().split())
s =[input() for i in range(h)]


for i in range(h):
  for j in range(w):
    count = 0 
    if s[i][j]==".":
      for k in [[0,1],[1,0],[-1,0],[0,-1],[1,1],[-1,-1],[1,-1],[-1,1]]:
        if 0<=k[0]+i<h and  0<=k[1]+j<w:
          if s[k[0]+i][k[1]+j]=="#":
            count = count +1
      s[i] = s[i][0:j]+str(count)+s[i][j+1:w]
      
for i in range(h):
  for j in range(w):
    print(s[i][j], end="")
  h,w = map(int,input().split())
s =[input() for i in range(h)]


for i in range(h):
  for j in range(w):
    count = 0 
    if s[i][j]==".":
      for k in [[0,1],[1,0],[-1,0],[0,-1],[1,1],[-1,-1],[1,-1],[-1,1]]:
        if 0<=k[0]+i<h and  0<=k[1]+j<w:
          if s[k[0]+i][k[1]+j]=="#":
            count = count +1
      s[i] = s[i][0:j]+str(count)+s[i][j+1:w]
      
for i in range(h):
  for j in range(w):
    print(s[i][j], end="")
  print()

Fixed submission:
h,w = map(int,input().split())
s =[input() for i in range(h)]


for i in range(h):
  for j in range(w):
    count = 0 
    if s[i][j]==".":
      for k in [[0,1],[1,0],[-1,0],[0,-1],[1,1],[-1,-1],[1,-1],[-1,1]]:
        if 0<=k[0]+i<h and  0<=k[1]+j<w:
          if s[k[0]+i][k[1]+j]=="#":
            count = count +1
      s[i] = s[i][0:j]+str(count)+s[i][j+1:w]
      
for i in range(h):
  for j in range(w):
    print(s[i][j], end="")
  print()
Buggy python submission (verdict: Runtime Error):
from operator import itemgetter


n = int(input())
info = [list(map(int, input().split())) for i in range(n)]

info = sorted(info, key = itemgetter(1))
print(info[0][0] + info[0][])

Fixed submission:
from operator import itemgetter


n = int(input())
info = [list(map(int, input().split())) for i in range(n)]

info = sorted(info, key = itemgetter(1))
print(info[0][0] + info[0][1])
Buggy python submission (verdict: Time Limit Exceeded):
n = int(input())
a = [list(map(int,input().split())) for i in range(n)]

ans = 0
for i in range(n):
  ans += sum(a[i])

memo = {}
for i in range(n):
  memo[i] = {}
for k in range(n):
  for i in range(n):
    for j in range(n):
      if k != i and i != j and j != k :
        if a[i][j] > a[i][k]+a[k][j]:
          print(-1)
          exit()
        elif a[i][j] == a[i][k]+a[k][j]:
          if j not in memo[i]:
            ans -= a[i][j]
            memo[i][j] = 1
                  
print(ans//2)

#プリム法
#mincost = [float("inf")]*n
#used = [False]*n
#mincost[0] = 0
#res = 0
#
#while True:
#  v = -1
#  for u in range(n):
#    if (not used[u]) and (v == -1 or mincost[u] < mincost[v]):
#      v = u
#  if v == -1:
#    break
#  used[v] = True
#  res += mincost[v]
#  for u in range(n):
#    mincost[u] = min(mincost[u],a[v][u])

Fixed submission:
n = int(input())
a = [list(map(int,input().split())) for i in range(n)]

ans = 0
for i in range(n):
  ans += sum(a[i])

memo = {}
for i in range(n):
  memo[i] = {}
for k in range(n):
  for i in range(n):
    for j in range(n):
      if k != i and i != j and j != k :
        if a[i][j] > a[i][k]+a[k][j]:
          print(-1)
          exit()
        elif a[i][j] == a[i][k]+a[k][j]:
          if j not in memo[i]:
            ans -= a[i][j]
            memo[i][j] = 1
                  
print(ans//2)

#プリム法
#mincost = [float("inf")]*n
#used = [False]*n
#mincost[0] = 0
#res = 0
#
#while True:
#  v = -1
#  for u in range(n):
#    if (not used[u]) and (v == -1 or mincost[u] < mincost[v]):
#      v = u
#  if v == -1:
#    break
#  used[v] = True
#  res += mincost[v]
#  for u in range(n):
#    mincost[u] = min(mincost[u],a[v][u])
Buggy python submission (verdict: Time Limit Exceeded):
from collections import deque
n = int(input())
num_hen = n-1
info = [list(map(int,input().split())) for i in range(num_hen)]

for i in range(num_hen):
  info[i][0] -=1
  info[i][1] -=1

tree=[[] for i in range(n)]
for i in range(num_hen):
  tree[info[i][0]].append(info[i][1])
  tree[info[i][1]].append(info[i][0])
  
#paintedが0のときまだ塗られていない、1のとき黒、-1のとき白
painted=[0]*n
painted[0]=1
painted[n-1]=-1

#0からn-1まで行くための経路を求める（dfsで経路復元する）。
#keiroが経路になる
que = deque()
for i in range(len(tree[0])):
  que.append([tree[0][i],0])
visited=[False]*n 
visited[0]=True
keiro =[]
while que:
  v = que.pop()
  for i in range(len(keiro))[::-1]:
    if keiro[i][1]>=v[1]:
      del keiro[i]
  keiro.append(v)
  if v[0] == n-1:
    del keiro[-1]
    break
  elif not visited[v[0]]:
    for i in range(len(tree[v[0]])):
      que.append([tree[v[0]][i],v[1]+1])
    visited[v[0]]=True

#経路を黒と白で塗る
for i in range(len(keiro)):
  if i%2==0:
    painted[keiro[i//2][0]]=1
  else:
    painted[keiro[len(keiro)-1-i//2][0]]=-1

#全部の頂点に渡ってペイントするためのdfs
def dfs(i,color):
  que2 = deque()
  for element in tree[i]:
    que2.append(element)
  while que2:
    w = que2.pop()
    if painted[w]==0:
      painted[w]=color
      for element in tree[w]:
        que2.append(element)
  return

for i in range(n):
  if painted[i]==1:
    dfs(i,1)
  elif painted[i]==-1:
    dfs(i,-1)

print("Fennec" if painted.count(1) > painted.count(-1) else "Snuke")


Fixed submission:
from collections import deque
n = int(input())
num_hen = n-1
info = [list(map(int,input().split())) for i in range(num_hen)]

for i in range(num_hen):
  info[i][0] -=1
  info[i][1] -=1

tree=[[] for i in range(n)]
for i in range(num_hen):
  tree[info[i][0]].append(info[i][1])
  tree[info[i][1]].append(info[i][0])
  
#paintedが0のときまだ塗られていない、1のとき黒、-1のとき白
painted=[0]*n
painted[0]=1
painted[n-1]=-1

#0からn-1まで行くための経路を求める（dfsで経路復元する）。
#keiroが経路になる
que = deque()
for i in range(len(tree[0])):
  que.append([tree[0][i],0])
visited=[False]*n 
visited[0]=True
keiro ={}
while que:
  v = que.pop()
  keiro[v[1]]=v[0]
  if v[0] == n-1:
    final = v[1]
    break
  elif not visited[v[0]]:
    for i in range(len(tree[v[0]])):
      que.append([tree[v[0]][i],v[1]+1])
    visited[v[0]]=True

#経路を黒と白で塗る
for i in range(final):
  if i%2==0:
    painted[keiro[i//2]]=1
  else:
    painted[keiro[final-1-i//2]]=-1

#全部の頂点に渡ってペイントするためのdfs
def dfs(i,color):
  que2 = deque()
  for element in tree[i]:
    que2.append(element)
  while que2:
    w = que2.pop()
    if painted[w]==0:
      painted[w]=color
      for element in tree[w]:
        que2.append(element)
  return

for i in range(n):
  if painted[i]==1:
    dfs(i,1)
  elif painted[i]==-1:
    dfs(i,-1)

print("Fennec" if painted.count(1) > painted.count(-1) else "Snuke")
Buggy python submission (verdict: Time Limit Exceeded):
n = int(input())
a = list(map(int,input().split()))

ans=[]
[ans.append(a[i]) if i%2 ==0 else ans.insert(0,a[i]) for i in range(n)]
print(str(ans).replace("[","").replace("]","").replace(",","") if n%2 ==0 else str(ans[::-1]).replace("[","").replace("]","").replace(",","") )

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

ans=[0]*n
for i in range(n):
  if i%2 ==0:
    ans[n//2+i//2]=a[i]
  else:
    ans[n//2-i//2-1]=a[i]

print(str(ans).replace("[","").replace("]","").replace(",","") if n%2 ==0 else str(ans[::-1]).replace("[","").replace("]","").replace(",","") )

Buggy python submission (verdict: Time Limit Exceeded):
n = int(input())
a = list(map(int,input().split()))
 
ans = []
for i in range(n):
  if i%2 ==0:
    ans.append(a[i])
  else:
    ans.insert(0,a[i])
 
print(str(ans).replace("[","").replace("]","").replace(",","") if n%2 ==0 else str(ans[::-1]).replace("[","").replace("]","").replace(",","") )

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

ans=[0]*n
for i in range(n):
  if i%2 ==0:
    ans[n//2+i//2]=a[i]
  else:
    ans[n//2-i//2-1]=a[i]

print(str(ans).replace("[","").replace("]","").replace(",","") if n%2 ==0 else str(ans[::-1]).replace("[","").replace("]","").replace(",","") )

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

ans = []
for i in range(n):
  if i%2 ==0:
    ans.append(a[i])
  else:
    ans.insert(0,a[i])

print(str(ans).replace("[","").replace("]","").replace(",","") if n%2 ==0 else str(ans[::-1]).replace("[","").replace("]","").replace(",","") )

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

ans=[0]*n
for i in range(n):
  if i%2 ==0:
    ans[n//2+i//2]=a[i]
  else:
    ans[n//2-i//2-1]=a[i]

print(str(ans).replace("[","").replace("]","").replace(",","") if n%2 ==0 else str(ans[::-1]).replace("[","").replace("]","").replace(",","") )

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

b=[]

for i in range(n):
  b.append(a[i])
  b.reverse()

for j in range(n):
  print(b[j], end=' ')

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

ans=[0]*n
for i in range(n):
  if i%2 ==0:
    ans[n//2+i//2]=a[i]
  else:
    ans[n//2-i//2-1]=a[i]

print(str(ans).replace("[","").replace("]","").replace(",","") if n%2 ==0 else str(ans[::-1]).replace("[","").replace("]","").replace(",","") )
Buggy python submission (verdict: Time Limit Exceeded):
n = int(input())
a = list(map(int,input().split()))

def comb(n,r):
    if n<r or r<0:
      return 0
    r = min(r,n-r)
    result = 1
    for i in range(n-r+1,n+1):
        result *= i
    for i in range(1,r+1):
        result //= i
    return result

sorted_a=sorted(a)
for i in range(n):
  if sorted_a[i]==sorted_a[i+1]:
    num = sorted_a[i]
    break

flag = True
for i in range(n+1):
  if a[i]==num:
    if flag:
      first = i
      flag = False
    else:
      second = i

combination=[0]*(n+2)
combination[0]=1
for i in range(1,n+2):
  combination[i] =combination[i-1]*(n+2-i)//i

combination2=[0]*(n+2)
combination2[0]=0
combination2[1]=1
for i in range(2,n+2):
  combination2[i] =combination2[i-1]*(first+n-second+1-(i-1))//(i-1)

  
for i in range(1,n+2):
  #ans = comb(n-1,i) + 2*comb(n-1,i-1)-comb(first+n-second,i-1) +comb(n-1,i-2)
  #ans = comb(n+1,i) - comb(first+n-second,i-1)
  ans = (combination[i] - combination2[i])%1000000007
  print(ans)

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



def cmb(n, r, mod):
    if ( r<0 or r>n ):
        return 0
    r = min(r, n-r)
    return g1[n] * g2[r] * g2[n-r] % mod

mod = 10**9+7 #出力の制限
N = 10**4
g1 = [1, 1] # 元テーブル
g2 = [1, 1] #逆元テーブル
inverse = [0, 1] #逆元テーブル計算用テーブル

for i in range( 2, n + 2 ):
    g1.append( ( g1[-1] * i ) % mod )
    inverse.append( ( -inverse[mod % i] * (mod//i) ) % mod )
    g2.append( (g2[-1] * inverse[-1]) % mod )


sorted_a=sorted(a)
for i in range(n):
  if sorted_a[i]==sorted_a[i+1]:
    num = sorted_a[i]
    break

flag = True
for i in range(n+1):
  if a[i]==num:
    if flag:
      first = i
      flag = False
    else:
      second = i

#combination=[0]*(n+2)
#combination[0]=1
#for i in range(1,n+2):
#  combination[i] =combination[i-1]*(n+2-i)//i
#combination2=[0]*(n+2)
#combination2[0]=0
#combination2[1]=1
#for i in range(2,n+2):
#  combination2[i] =combination2[i-1]*(first+n-second+1-(i-1))//(i-1)

#for i in range(1,n+2):
  #ans = comb(n-1,i) + 2*comb(n-1,i-1)-comb(first+n-second,i-1) +comb(n-1,i-2)
  #ans = comb(n+1,i) - comb(first+n-second,i-1)
  #ans = (combination[i]%1000000007-combination2[i]%1000000007)%1000000007
  #print(ans)  
  
for i in range(1,n+2):
  ans = cmb(n+1,i,mod) - cmb(first+n-second,i-1,mod)
  print(ans%mod)
Buggy python submission (verdict: Runtime Error):
s = input()
ss = set(s)s = input()
li_s = list(s) 
li_ss= list(set(s)) 

if len(li_s)==len(li_ss):
  print("yes")
else:
  print("no")

Fixed submission:
s = input()
li_s = list(s) 
li_ss= list(set(s)) 
 
if len(li_s)==len(li_ss):
  print("yes")
else:
  print("no")
Buggy python submission (verdict: Time Limit Exceeded):
import sys
input = sys.stdin.readline
import heapq
n,a,b = map(int,input().split())
q = [-int(input()) for i in range(n)]
heapq.heapify(q)
 
 
ans = 0
count = 0
while q[0]+b*count<0:
  num = heapq.heappop(q)
  num=num+(a-b)
  heapq.heappush(q,num)
  ans += 1
  count += 1
print(ans)

Fixed submission:
n,a,b = map(int,input().split())

h = [int(input()) for i in range(n)]
diff = a-b
def solve(num):
  kaisu = 0
  for i in range(n):
    if -((-(h[i]-num*b))//diff) > 0:
      kaisu += -((-(h[i]-num*b))//diff)
  if kaisu <= num:
    return True
  else:
    return False
    
ng = 0
ok = 1000000001

while abs(ok-ng)>1:
  mid = (ok+ng)//2
  if solve(mid):
    ok = mid
  else:
    ng = mid
#  print(ng,ok)
print(ok)

Buggy python submission (verdict: Time Limit Exceeded):
import heapq
n,a,b = map(int,input().split())
q = [-int(input()) for i in range(n)]
heapq.heapify(q)


ans = 0
count = 0
while q[0]+b*count<0:
  num = heapq.heappop(q)
  num=num+(a-b)
  heapq.heappush(q,num)
  ans += 1
  count += 1
print(ans)

Fixed submission:
n,a,b = map(int,input().split())

h = [int(input()) for i in range(n)]
diff = a-b
def solve(num):
  kaisu = 0
  for i in range(n):
    if -((-(h[i]-num*b))//diff) > 0:
      kaisu += -((-(h[i]-num*b))//diff)
  if kaisu <= num:
    return True
  else:
    return False
    
ng = 0
ok = 1000000001

while abs(ok-ng)>1:
  mid = (ok+ng)//2
  if solve(mid):
    ok = mid
  else:
    ng = mid
#  print(ng,ok)
print(ok)
Buggy python submission (verdict: Runtime Error):
from collections import deque


n, m = map(int, input().split())
tree = [[] for i in range(n)]
path = {}
for i in range(m):
    tmp1, tmp2, cost = map(int, input().split())
    tree[tmp1-1].append([tmp2-1, cost])

q = deque()
q.append([-1, 0])
pos_cost = [-10**10]*n
pos_cost[0] = 0
path = {}

def judge(start):
    q2 = deque()
    q2.append(start)
    visited = [False]*n
    visited[start] = True
    while q2:
        pos = q2.popleft()
        for next_pos, cost in tree[pos]:
            if not visited[next_pos]:
                q.append(next_pos)
                visited[next_pos] = True
    if visited[n-1]:
        print("inf")
        exit()

while q:
    prev_pos, pos = q.popleft()
    if prev_pos*10000 + pos in path:
        judge(pos)
        continue
    path[prev_pos*10000 + pos] = 1
    for next_pos, cost in tree[pos]:
        if pos_cost[pos] + cost > pos_cost[next_pos]:
            pos_cost[next_pos] = pos_cost[pos] + cost
            q.append([pos, next_pos])
print(pos_cost[n-1])

Fixed submission:
from collections import deque


n, m = map(int, input().split())
tree = [[] for i in range(n)]
path = {}
for i in range(m):
    tmp1, tmp2, cost = map(int, input().split())
    tree[tmp1-1].append([tmp2-1, cost])

q = deque()
q.append([-1, 0])
pos_cost = [-float("inf")]*n
pos_cost[0] = 0
path = {}

def judge(start):
    q2 = deque()
    q2.append(start)
    visited = [False]*n
    visited[start] = True
    while q2:
        pos = q2.popleft()
        for next_pos, cost in tree[pos]:
            if not visited[next_pos]:
                q2.append(next_pos)
                visited[next_pos] = True
    if visited[n-1]:
        print("inf")
        exit()

while q:
    prev_pos, pos = q.popleft()
    if prev_pos*10000 + pos in path:
        judge(pos)
        continue
    path[prev_pos*10000 + pos] = 1
    for next_pos, cost in tree[pos]:
        if pos_cost[pos] + cost > pos_cost[next_pos]:
            pos_cost[next_pos] = pos_cost[pos] + cost
            q.append([pos, next_pos])
print(pos_cost[n-1])
Buggy python submission (verdict: Runtime Error):
x,y =map(int,input())
print("Brown" if abs(x-y)<=1 else "Alice")

Fixed submission:
x,y =map(int,input().split())
print("Brown" if abs(x-y)<=1 else "Alice")

Buggy python submission (verdict: Runtime Error):
from collections import deque
n,m = map(int,input().split())
info = [list(map(int,input().split())) for i in range(m)]

tree = [[] for i in range(n)]

for i in range(m):
  tree[info[i][0]-1].append([info[i][0]-1,info[i][1]-1,info[i][2],False])
flag= [False]
visited =[-float("inf")]*n
visited[0]=0
count = [0]


def bfs(here):
  q =deque()
  for i in tree[here]:
    q.append(i)
  while q and count[0] <=m*n:
    tmp = q.popleft()
    here =tmp[0]
    go = tmp[1]
    cost = tmp[2]
    if visited[here] + cost> visited[go]:
      visited[go] = cost +visited[here]
    for i in range(len(tree[go])):
      if not tree[go][i][3]: 
        q.appendleft(tree[go][i])
        tree[go][i][3]=True
        
      else:
        q.append(tree[go][i])
        if go == n-1:
          print("inf")
          exit()

    count[0] +=1

    
bfs(0)
print(visited[n-1])

Fixed submission:
x,y =map(int,input().split())
print("Brown" if abs(x-y)<=1 else "Alice")
Buggy python submission (verdict: Runtime Error):
o = input()
e = input()

for i in range(max(len(o),len(e))):
  if 0<=i<len(o):
    print(o(i),end="")
  if 0<=i<len(e):
    print(e(i), end="")
print()

Fixed submission:
o = input()
e = input()

for i in range(max(len(o),len(e))):
  if 0<=i<len(o):
    print(o[i],end="")
  if 0<=i<len(e):
    print(e[i], end="")
print()
Buggy python submission (verdict: Runtime Error):
MOD = 10 ** 9 + 7
n = int(input())


dp = [-1] * (n + 1)
dp[0] = 1
def cnt(num):
    ans = 0
    if num < 0:
        return 1
    if dp[num] != -1:
        return dp[num]
    if num == 1:
        dp[num] = n
        return n
      
    for i in range(n):
        if i == 0:
            ans += cnt(num - 1)
            ans %= MOD
        else:
            ans += cnt(num - 2 - i)
            ans += n - 1
            ans %= MOD
    dp[num] = ans
    return ans

dp[0] = 1
print(cnt(n))

Fixed submission:
MOD = 10 ** 9 + 7
n = int(input())

"""
dp = [-1] * (n + 1)
dp[0] = 1
def cnt(num):
    ans = 0
    if num < 0:
        return 1
    if dp[num] != -1:
        return dp[num]
    if num == 1:
        dp[num] = n
        return n
      
    for i in range(n):
        if i == 0:
            ans += cnt(num - 1)
            ans %= MOD
        else:
            if num - 2 - i < 0:
                ans += 1
            else:
                ans += cnt(num - 2 - i)
            ans += n - 1
            ans %= MOD
    dp[num] = ans
    return ans

dp[0] = 1
print(cnt(n))
"""

dq = [0] * (n + 1)
sum_ = [0] * (n + 1)
dq[0] = 1
sum_[0] = 1
for i in range(n):
    if i == 0:
        dq[i + 1] = n
        sum_[i + 1] = sum_[i] + dq[i + 1]
        continue
    """
    for j in range(n):
        if j == 0:
            dq[i + 1] += dq[i]
        else:
            if i - 1 - j < 0:
                dq[i + 1] += 1
            else:
                dq[i + 1] += dq[i - 1 - j]
            dq[i + 1] += n - 1
    """
    dq[i + 1] += dq[i]
    dq[i + 1] += (n - 1) * (n - 1)
    dq[i + 1] += sum_[i - 2]
    dq[i + 1] += abs(i - n)
    dq[i + 1] %= MOD
    sum_[i + 1] = sum_[i] + dq[i + 1]
    sum_[i + 1] %= MOD

print(dq[-1])
Buggy python submission (verdict: Runtime Error):
x = int(input())
print("ABC" if x<=1199 else "ARC )

Fixed submission:
x = int(input())
print("ABC" if x<=1199 else "ARC")
Buggy python submission (verdict: Runtime Error):
n = int(input())
tree = [[] for i in range(n)]
for i in range(n - 1):
    j = int(input())
    j -= 1
    i += 1
    tree[i].append(j)
    tree[j].append(i)

def dfs(pos):
    if pos != 0 and len(tree[pos]) == 1:
        return 1
    li = []
    for next_pos in tree[pos]:
        if visited[next_pos]:
            continue
        visited[next_pos] = True
        li.append(dfs(next_pos))
    max_li = max(li)
    len_li = len(li)
    res = max(len_li + 1, max_li + 1)
    return res

visited = [False] * n
visited[0] = True
print(dfs(0) - 1)

Fixed submission:
import sys
sys.setrecursionlimit(1000000)

n = int(input())
tree = [[] for i in range(n)]
for i in range(n - 1):
    j = int(input())
    j -= 1
    i += 1
    tree[i].append(j)
    tree[j].append(i)

def dfs(pos):
    if pos != 0 and len(tree[pos]) == 1:
        return 1
    li = []
    for next_pos in tree[pos]:
        if visited[next_pos]:
            continue
        visited[next_pos] = True
        li.append(dfs(next_pos))
    li = sorted(li)
    res = 0
    for i in range(len(li)):
        if li[i] > res:
            res = li[i]
        elif li[i] <= res:
            res += 1
    return res + 1

visited = [False] * n
visited[0] = True
print(dfs(0) - 1)