qyliang/CodeNanoFix huggingface dataset:
Buggy code:
N = int(input())
dp = [[[[0 for l in range(4)] for k in range(4)]
       for j in range(4)] for i in range(N)]
for j in range(4):
    for k in range(4):
        for l in range(4):
            if not (j == 0 and k == 1 and l == 2)\
                    and not(j == 0 and k == 2 and l == 1)\
                    and not (j == 2 and k == 0 and l == 1):
                dp[2][j][k][l] = 1
for i in range(2, N-1):
    for j in range(4):
        for k in range(4):
            for l in range(4):
                dp[i][j][k][l] %= 10**9+7
                dp[i+1][k][l][0] += dp[i][j][k][l]
                # 0123: ACGT
                # AG?
                # ?GA
                # A?G
                # ?AG
                if not (j == 0 and k == 2) \
                   and not (k == 2 and l3 == 0)\
                   and not (j == 0 and l == 2)\
                   and not (k == 0 and l == 2):
                    dp[i+1][k][l][1] += dp[i][j][k][l]
                # ?AC
                if not (k == 0 and l == 1):
                    dp[i+1][k][l][2] += dp[i][j][k][l]
                dp[i+1][k][l][3] += dp[i][j][k][l]
ans = 0
for j in range(4):
    for k in range(4):
        for l in range(4):
            ans += dp[N-1][j][k][l]
ans %= 10**9+7
print(ans)


Fixed code:
N = int(input())
dp = [[[[0 for l in range(4)] for k in range(4)]
       for j in range(4)] for i in range(N)]
for j in range(4):
    for k in range(4):
        for l in range(4):
            if not (j == 0 and k == 1 and l == 2)\
                    and not(j == 0 and k == 2 and l == 1)\
                    and not (j == 2 and k == 0 and l == 1):
                dp[2][j][k][l] = 1
for i in range(2, N-1):
    for j in range(4):
        for k in range(4):
            for l in range(4):
                dp[i][j][k][l] %= 10**9+7
                dp[i+1][k][l][0] += dp[i][j][k][l]
                # 0123: ACGT
                # AG?
                # ?GA
                # A?G
                # ?AG
                if not (j == 0 and k == 2) \
                   and not (k == 2 and l == 0)\
                   and not (j == 0 and l == 2)\
                   and not (k == 0 and l == 2):
                    dp[i+1][k][l][1] += dp[i][j][k][l]
                # ?AC
                if not (k == 0 and l == 1):
                    dp[i+1][k][l][2] += dp[i][j][k][l]
                dp[i+1][k][l][3] += dp[i][j][k][l]
ans = 0
for j in range(4):
    for k in range(4):
        for l in range(4):
            ans += dp[N-1][j][k][l]
ans %= 10**9+7
print(ans)
Buggy code:
import sys
sys.setrecursionlimit(10**7)
INF = 10 ** 18
MOD = 10 ** 9 + 7
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 LF(): return [float(x) for x in sys.stdin.readline().split()]
def LS(): return sys.stdin.readline().split()
def II(): return int(sys.stdin.readline())
def SI(): return input()

from itertools import product
import numpy as np

def main():
    N = II()
    A, G, C, T = 0, 1, 2, 3
    dp = np.zeros((N + 1, 4, 4, 4), int)
    dp[0, T, T, T] = 1
    for n in range(N):
        for p1, p2, p3 in product(range(4), repeat=3):
            for cur in range(4):
                if (p2, p1, cur) == (A, G, C):
                    continue
                if (p2, p1, cur) == (A, C, G):
                    continue
                if (p2, p1, cur) == (G, A, C):
                    continue
                if (p3, p1, cur) == (A, G, C):
                    continue
                if (p3, p2, cur) == (A, G, C):
                    continue
                dp[n + 1, cur, p1, p2] += dp[n, p1, p2, p3]
    ans = np.sum(dp[N])

    return ans % MOD

print(main())

Fixed code:
import sys
sys.setrecursionlimit(10**7)
INF = 10 ** 18
MOD = 10 ** 9 + 7
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 LF(): return [float(x) for x in sys.stdin.readline().split()]
def LS(): return sys.stdin.readline().split()
def II(): return int(sys.stdin.readline())
def SI(): return input()

from itertools import product
import numpy as np

def main():
    N = II()
    A, G, C, T = 0, 1, 2, 3
    dp = np.zeros((N + 1, 4, 4, 4), int)
    dp[0, T, T, T] = 1
    for n in range(N):
        for p1, p2, p3 in product(range(4), repeat=3):
            for cur in range(4):
                if (p2, p1, cur) == (A, G, C):
                    continue
                if (p2, p1, cur) == (A, C, G):
                    continue
                if (p2, p1, cur) == (G, A, C):
                    continue
                if (p3, p1, cur) == (A, G, C):
                    continue
                if (p3, p2, cur) == (A, G, C):
                    continue
                dp[n + 1, cur, p1, p2] = \
                    (dp[n + 1, cur, p1, p2] + dp[n, p1, p2, p3]) % MOD
    ans = np.sum(dp[N])

    return ans % MOD

print(main())
Buggy code:
import itertools as it

N=int(input())
dp=dict()
def ok(s):
    return all(['AGC' not in t for t in 
        [s, s[0:2]+s[3]+s[2], s[0]+s[2]+s[1]+s[3], s[1]+s[0]+s[2:4]]]) 

def n(j, s):
    print(j, s)
    if j == 3:
        return 1 if s not in ["AGC", "ACG", "GAC"] else 0
    if (j, s) in dp:
        return dp[(j, s)]
    ret = sum([
        n(j-1, "A"+s[:3]) if ok("A"+s[:3]) else 0,
        n(j-1, "C"+s[:3]) if ok("C"+s[:3]) else 0,
        n(j-1, "G"+s[:3]) if ok("G"+s[:3]) else 0,
        n(j-1, "T"+s[:3]) if ok("T"+s[:3]) else 0]
    )
    dp[(j, s)]=ret
    return ret

m=sum([n(N, "".join(s)) for s in it.product("ACGT", repeat=3)])
print(m%(10**9+7))

Fixed code:
import itertools as it

N=int(input())
dp=dict()
def ok(s):
    return all(['AGC' not in t for t in 
        [s, s[0:2]+s[3]+s[2], s[0]+s[2]+s[1]+s[3], s[1]+s[0]+s[2:4]]]) 

def n(j, s):
    if j == 3:
        return 1 if s not in ["AGC", "ACG", "GAC"] else 0
    if (j, s) in dp:
        return dp[(j, s)]
    ret = sum([
        n(j-1, "A"+s[:3]) if ok("A"+s[:3]) else 0,
        n(j-1, "C"+s[:3]) if ok("C"+s[:3]) else 0,
        n(j-1, "G"+s[:3]) if ok("G"+s[:3]) else 0,
        n(j-1, "T"+s[:3]) if ok("T"+s[:3]) else 0]
    )
    dp[(j, s)]=ret
    return ret

m=sum([n(N, "".join(s)) for s in it.product("ACGT", repeat=3)])
print(m%(10**9+7))
Buggy code:
def check(s):
    c = False
    if s[:3] == "AGC" or s[1:] == "AGC" or s[0] + s[2:] == "AGC" or s[:2] + s[3] == "AGC" or s[:3] == "ACG" or s[1:] == "ACG" or s[:3] == "GAC" or s[1:] == "GAC":
        c = True
    return c

from collections import defaultdict
from itertools import product
N = int( input())
Q = 10**9 + 7
dp = [ defaultdict( int) for _ in range(N+1)]

for s in product("AGCT", repeat = 3):
    dp[3]["".join(s)] = 1
ans = 0
for i in range(4, N+1):
    for c in product("AGCT", repeat = 3):
        c = "".join(c)
        for t in "AGCT":
            if check(c+t):
                print(c+t, dp[i-1][c])
                ans += (dp[i-1][c]*pow(4,i-4,Q))%Q
                ans %= Q
            else:
                dp[i][c[1:]+t] += dp[i-1][c]
                dp[i][c[1:]+t] %= Q
if N == 3:
    ans = 3
print( (pow(4,N,Q) - ans)%Q)

Fixed code:
def check(s):
    c = False
    if s[:3] == "AGC" or s[1:] == "AGC" or s[0] + s[2:] == "AGC" or s[:2] + s[3] == "AGC" or s[:3] == "ACG" or s[1:] == "ACG" or s[:3] == "GAC" or s[1:] == "GAC":
        c = True
    return c

from collections import defaultdict
from itertools import product
N = int( input())
Q = 10**9 + 7
dp = [ defaultdict( int) for _ in range(N+1)]

for s in product("AGCT", repeat = 3):
    dp[3]["".join(s)] = 1
ans = 0
for i in range(4, N+1):
    for c in product("AGCT", repeat = 3):
        c = "".join(c)
        for t in "AGCT":
            if check(c+t):
                # print(c+t, dp[i-1][c])
                ans += (dp[i-1][c]*pow(4,N-i,Q))%Q
                ans %= Q
            else:
                dp[i][c[1:]+t] += dp[i-1][c]
                dp[i][c[1:]+t] %= Q
if N == 3:
    ans = 3
print( (pow(4,N,Q) - ans)%Q)
Buggy code:
import re, copy
import itertools
N= int(input())

pat='(AGC|ACG|GAC|AGAC|AGTC|AGCC|AAGC|ATGC|AGGC)'
repattern = re.compile(pat)

memo={}

for s in itertools.product('ATGC', repeat=3):
  if not repattern.search(''.join(s)):
  	memo[''.join(s)] = 1
  
for _ in range(3,N):
  new_memo={}
  for k,v in memo.items():
    for c in 'ATGC':
      if not repattern.search(k+c):
        new_memo[(k+c)[-3:]] = new_memo.get((k+c)[-3:],0)+v
  memo=new_memo

print(sum(memo.values())%(10**9+7)

Fixed code:
import re, copy
import itertools
N= int(input())

pat='(AGC|ACG|GAC|AGAC|AGTC|AGCC|AAGC|ATGC|AGGC)'
repattern = re.compile(pat)

memo={}

for s in itertools.product('ATGC', repeat=3):
  if not repattern.search(''.join(s)):
  	memo[''.join(s)] = 1
  
for _ in range(3,N):
  new_memo={}
  for k,v in memo.items():
    for c in 'ATGC':
      if not repattern.search(k+c):
        new_memo[(k+c)[-3:]] = new_memo.get((k+c)[-3:],0)+v
  memo=new_memo

print(sum(memo.values())%(10**9+7))
Buggy code:
N, MOD = int(input()), 10 ** 9 + 7
memo = [{} for i in range(N+1)]

def ok(last4):
　　for i in range(4):
		t = list(last4)
    if i >= 1:
		t[i-1], t[i] = t[i], t[i-1]
	if ''.join(t).count('AGC') >= 1:
		return False
	return True

def dfs(cur, last3):
	if last3 in memo[cur]:
		return memo[cur][last3]
	if cur == N:
		return 1
	ret = 0
	for c in 'ACGT':
		if ok(last3 + c):
			ret = (ret + dfs(cur + 1, last3[1:] + c)) % MOD
	memo[cur][last3] = ret
	return ret

print(dfs(0, 'TTT'))

Fixed code:
N, MOD = int(input()), 10 ** 9 + 7
memo = [{} for i in range(N+1)]

def ok(last4):
	for i in range(4):
		t = list(last4)
		if i >= 1:
			t[i-1], t[i] = t[i], t[i-1]
		if ''.join(t).count('AGC') >= 1:
			return False
	return True

def dfs(cur, last3):
	if last3 in memo[cur]:
		return memo[cur][last3]
	if cur == N:
		return 1
	ret = 0
	for c in 'ACGT':
		if ok(last3 + c):
			ret = (ret + dfs(cur + 1, last3[1:] + c)) % MOD
	memo[cur][last3] = ret
	return ret

print(dfs(0, 'TTT'))
Buggy code:
import sys
input = sys.stdin.readline

import numpy as np

mod = 10 ** 9 + 7

def question():
    n = int(input())

    a = [0] * (n+1)
    a[1] = 1
    a[2] = 4
    a[3] = 16

    t = [0] * (n+1)
    t[1] = 1
    t[2] = 4
    t[3] = 16

    c = [0] * (n+1)
    c[1] = 1
    c[2] = 4
    c[3] = 14

    g = [0] * (n+1)
    g[1] = 1
    g[2] = 4
    g[3] = 15

    for i in range(3, n):
        a[i + 1] = a[i] + t[i] + c[i] + g[i]
        t[i + 1] = a[i] + t[i] + c[i] + g[i]
        c[i + 1] = a[i] + t[i] + c[i] + g[i] - (a[i-1] + 2 * a[i-2] + g[i-1])
        g[i + 1] = a[i] + t[i] + c[i] + g[i] - (a[i-1])

        a[i+1] = a[i+1] % mod
        t[i+1] = t[i+1] % mod
        c[i+1] = c[i+1] % mod
        g[i+1] = g[i+1] % mod

    print(a[n]+t[n]+c[n]+g[n])


question()


Fixed code:

import sys
input = sys.stdin.readline

import numpy as np

mod = 10 ** 9 + 7

def question():
    n = int(input())

    a = [0] * (n+1)
    a[1] = 1
    a[2] = 4
    a[3] = 16

    t = [0] * (n+1)
    t[1] = 1
    t[2] = 4
    t[3] = 16

    c = [0] * (n+1)
    c[1] = 1
    c[2] = 4
    c[3] = 14

    g = [0] * (n+1)
    g[1] = 1
    g[2] = 4
    g[3] = 15

    for i in range(3, n):
        a[i + 1] = a[i] + t[i] + c[i] + g[i]
        t[i + 1] = a[i] + t[i] + c[i] + g[i]
        c[i + 1] = a[i] + t[i] + c[i] + g[i] - (a[i-1] + 3 * a[i-2] + g[i-1])
        g[i + 1] = a[i] + t[i] + c[i] + g[i] - (a[i-1] - g[i-2])

        #a[i+1] = a[i+1] % mod
        #t[i+1] = t[i+1] % mod
        #c[i+1] = c[i+1] % mod
        #g[i+1] = g[i+1] % mod

    print((a[n]+t[n]+c[n]+g[n]) % mod)


question()
Buggy code:
N = int(input())

S = 'AGCT'  # AGCT = 0123
num = [[[1]*4 for _ in range(4)] for _ in range(4)]

count = 0
for i in range(4, N+1):
    num_now = [[[0] * 4 for _ in range(4)] for _ in range(4)]
    for pre3 in range(4):
        for pre2 in range(4):
            for pre1 in range(4):
                for now in range(4):
                    now_S = S[pre2] + S[pre1] + S[now]
                    now_S2 = S[pre3] + S[pre2] + S[pre1]
                    if now_S2 != 'AGC' and now_S2 != 'GAC' and now_S2 != 'ACG' and now_S != 'AGC' and now_S != 'GAC' and now_S != 'ACG' and S[pre3] + S[pre1] + S[now] != 'AGC' and S[pre3] + S[pre2] + S[now] != 'AGC':
                        num_now[now][pre1][pre2] += num[pre1][pre2][pre3]
                        if i == N:
                            count += num[pre1][pre2][pre3]

    num = num_now.copy()


print(count%((10**9) + 7))


Fixed code:
N = int(input())

S = 'AGCT'  # AGCT = 0123
num = [[[1]*4 for _ in range(4)] for _ in range(4)]

count = 0
if N == 3:
    print(61)
    exit()
for i in range(4, N+1):
    num_now = [[[0] * 4 for _ in range(4)] for _ in range(4)]
    for pre3 in range(4):
        for pre2 in range(4):
            for pre1 in range(4):
                for now in range(4):
                    now_S = S[pre2] + S[pre1] + S[now]
                    now_S2 = S[pre3] + S[pre2] + S[pre1]
                    if now_S2 != 'AGC' and now_S2 != 'GAC' and now_S2 != 'ACG' and now_S != 'AGC' and now_S != 'GAC' and now_S != 'ACG' and S[pre3] + S[pre1] + S[now] != 'AGC' and S[pre3] + S[pre2] + S[now] != 'AGC':
                        num_now[now][pre1][pre2] += num[pre1][pre2][pre3]
                        if i == N:
                            count += num[pre1][pre2][pre3]

    num = num_now.copy()


print(count%((10**9) + 7))
Buggy code:
n = int(input())

mod = 10**9 + 7

dp = [[0] * (4**3) for _ in range(n+1)]

for w in range(4**3):
    if (w // 16) % 4 == 0 and (w // 4) % 4 == 2 and w % 4 == 3:
        continue
    if (w // 16) % 4 == 0 and (w // 4) % 4 == 3 and w % 4 == 2:
        continue
    if (w // 16) % 4 == 2 and (w // 4) % 4 == 0 and w % 4 == 3:
        continue
    dp[3][w] = 1

for i in range(3, n):
    for w in range(4**3):
        for nw in range(4):
            if (w // 4) % 4 == 0 and w % 4 == 2 and nw == 3:
                continue
            if (w // 4) % 4 == 0 and w % 4 == 3 and nw == 2:
                continue
            if (w // 4) % 4 == 2 and w % 4 == 0 and nw == 3:
                continue
            if (w // 16) % 4 == 0 and (w // 4) % 4 == 2 and nw == 3:
                continue
            if (w // 16) % 4 == 0 and w % 4 == 2 and nw % 4 == 3:
                continue
            dp[i+1][(w // 4) + nw * 16] += dp[i][w]
            dp[i+1][(w // 4) + nw * 16] %= mod

ans = 0
for w in range(4**3):
    ans += dp[n][w]
    ans %= mod

print(ans)

Fixed code:
n = int(input())

mod = 10**9 + 7

dp = [[0] * (4**3) for _ in range(n+1)]

for w in range(4**3):
    if (w // 16) % 4 == 0 and (w // 4) % 4 == 2 and w % 4 == 3:
        continue
    if (w // 16) % 4 == 0 and (w // 4) % 4 == 3 and w % 4 == 2:
        continue
    if (w // 16) % 4 == 2 and (w // 4) % 4 == 0 and w % 4 == 3:
        continue
    dp[3][w] = 1

for i in range(3, n):
    for w in range(4**3):
        for nw in range(4):
            if (w // 4) % 4 == 0 and w % 4 == 2 and nw == 3:
                continue
            if (w // 4) % 4 == 0 and w % 4 == 3 and nw == 2:
                continue
            if (w // 4) % 4 == 2 and w % 4 == 0 and nw == 3:
                continue
            if (w // 16) % 4 == 0 and (w // 4) % 4 == 2 and nw == 3:
                continue
            if (w // 16) % 4 == 0 and w % 4 == 2 and nw % 4 == 3:
                continue
            dp[i+1][(((w // 4) % 4) * 16 + (w % 4) * 4) + nw] += dp[i][w]
            dp[i+1][(((w // 4) % 4) * 16 + (w % 4) * 4) + nw] %= mod

ans = 0
for w in range(4**3):
    ans += dp[n][w]
    ans %= mod

print(ans)
Buggy code:
N = int(input())
b = list(map(int, input().split()))

for i in range(N):
  if i + 1 < b[i]:
    print("-1")
    exit()

b.reverse()
L = []
for i in range(1, N + 1):
  cnt = 0
  for j in range(0, N):
    if i == 1:
      if b[j] == i:
        L.append(i)
    else:
      if b[j] == i:
        L.insert(i + cnt - 1, i)
        cnt += 1
      elif b[j] < i:
        cnt += 1

print(L)
  

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

for i in range(N):
  if i + 1 < b[i]:
    print("-1")
    exit()

b.reverse()
L = []
for i in range(1, N + 1):
  cnt = 0
  for j in range(0, N):
    if i == 1:
      if b[j] == i:
        L.append(i)
    else:
      if b[j] == i:
        L.insert(i + cnt - 1, i)
        cnt += 1
      elif b[j] < i:
        cnt += 1

for i in L:
  print(i)
Buggy code:
n = int(input())
a = list(map(int, input().split()))

result =[]
while len(a) > 0:
    ok = False
    for i in range(len(a)-1, -1, -1):
        print(i, len(a))
        if i+1 == a[i]:
            result.append(a[i])
            a.pop(i)
            ok = True
            break
    if not ok:
        result = [-1]
        break
for i in result[::-1]: print(i)

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

result =[]
while len(a) > 0:
    ok = False
    for i in range(len(a)-1, -1, -1):
        if i+1 == a[i]:
            result.append(a[i])
            a.pop(i)
            ok = True
            break
    if not ok:
        result = [-1]
        break
for i in result[::-1]: print(i)
Buggy code:
n = int(input())
a = [int(i) - 1 for i in input().split()]
ans = []
while len(a):
    key = -1
    for i, j in enumerate(a):
        if i == j:
            ans.append(i)
            key = i
            break
    if key == -1:
        break
    else:
        a.remove(key)

if len(ans) != n:
    print(-1)
else:
    for i in ans[::-1]:
        print(i)


Fixed code:
n = int(input())
a = [int(i) - 1 for i in input().split()]
ans = []
while len(a):
    key = -1
    for i, j in enumerate(a):
        if i == j:
            key = i
    if key == -1:
        break
    else:
        a.remove(key)
        ans.append(key + 1)

if len(ans) != n:
    print(-1)
else:
    for i in ans[::-1]:
        print(i)
Buggy code:
import sys

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

s=s+[10**6]
ans=[0]*N


for i in range (N):
    m=-1
    for j in range (N-i):
        if s[j]==j+1:
            m=j
    if m<0:
        sys.exit()
    
    ans[N-i-1]=m+1
    
    for j in range (m,N):
        s[j]=s[j+1]
        
    
for i in range(N): print(ans[i]) 

Fixed code:
import sys

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

s=s+[10**6]
ans=[0]*N


for i in range (N):
    m=-1
    for j in range (N-i):
        if s[j]==j+1:
            m=j
    if m<0:
        print(m)
        sys.exit()
    
    ans[N-i-1]=m+1
    
    for j in range (m,N):
        s[j]=s[j+1]
        
    
for i in range(N): print(ans[i])
Buggy code:
N = int(input())
list_b = list(map(int, input().split()))
ans = [0 for i in range(N)]

finish = False

for i in range(N-1, -1, -1):
  mx = -1
  for k in range(i+1):
    if list_b[k] == k+1:
      mx = k+1
  if mx == -1:
    finish = True
    break
  else:
    ans[i] = mx
    for j in range(mx-1, i):
      list_b[j] = list_b[j+1]
  print(list_b)
    
if not finish:
    for i in range(N):
        print(ans[i])
else:
    print(-1)

Fixed code:
N = int(input())
list_b = list(map(int, input().split()))
ans = [0 for i in range(N)]

finish = False

for i in range(N-1, -1, -1):
  mx = -1
  for k in range(i+1):
    if list_b[k] == k+1:
      mx = max(mx, k+1)
  if mx == -1:
    finish = True
    break
  else:
    ans[i] = mx
    for j in range(mx-1, i):
      list_b[j] = list_b[j+1]
    
if not finish:
    for i in range(N):
        print(ans[i])
else:
    print(-1)
Buggy code:
N = int(input())
b = []
c = [0]*N
count_flag=0
b = list(map(int, input().split()))
#print(b)
for count in range(N):
  for i in range(N-count):
    if count_flag == count and b[N-1-count-i]==N-1-count-i+1 :
      #c[count]=N-1-count-i
      c[N-1-count]=N-1-count-i+1
      b.pop(N-1-count-i)
      count_flag+=1
       #break
for i in range(N):
  print(c[i])

Fixed code:
N = int(input())
b = []
c = [0]*N
count_flag=0
b = list(map(int, input().split()))
#print(b)
for count in range(N):
  for i in range(N-count):
    if count_flag == count and b[N-1-count-i]==N-1-count-i+1 :
      c[N-1-count]=N-1-count-i+1
      b.pop(N-1-count-i)
      count_flag+=1
if count_flag == N:
  for i in range(N):
    print(c[i])
else:print(-1)
Buggy code:
n = int(input())
b = list(map(int, input().split()))

lst = []
for i in range(n, 0, -1):
    for j in range(i - 1, -1, -1):
        if b[j] == j + 1:
            lst.append(j + 1)
            b.pop(j)
            break
    else:
        print("No")
        break

for num in lst[::-1]:
    print(num)

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

lst = []
for i in range(n, 0, -1):
    for j in range(i - 1, -1, -1):
        if b[j] == j + 1:
            lst.append(j + 1)
            b.pop(j)
            break
    else:
        print(-1)
        exit()

for num in lst[::-1]:
    print(num)
Buggy code:
N = int(input())
blist = list(map(int, input().split()))
ans = []
for i in range(N):
    for index in range(N-1, -1, -1):
        if blist[index] == index + 1:
            ans.append(blist.pop(index))
            break
    else:
        print(-1)
        break
else:
    for num in ans:
        print(num)


Fixed code:
N = int(input())
blist = list(map(int, input().split()))
ans = []
for i in range(N):
    for index in range(N-i-1, -1, -1):
        if blist[index] == index + 1:
            ans.append(blist.pop(index))
            break
    else:
        print(-1)
        break
else:
    for num in ans[::-1]:
        print(num)
Buggy code:
import math, string, itertools, fractions, heapq, collections, re,  array, bisect, sys, random, time, copy, functools
sys.setrecursionlimit(10**7)
inf = 10 ** 20
eps = 1.0 / 10**10
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 LF(): return [float(x) for x in sys.stdin.readline().split()]
def LS(): return sys.stdin.readline().split()
def I(): return int(sys.stdin.readline())
def F(): return float(sys.stdin.readline())
def pf(s): return print(s, flush=True)


N = I()
b = LI()

result = []
while True:
    #  print(b)
    for i in range(1, len(b)+1):
        #  print(i)
        if b[-i] == len(b)-i+1:
            #  print('break')
            result.append(b[-i])
            b.pop(b[-i])
            break
    else:
        if not b:
            break
        print(-1)
        exit()
for i in result[::-1]:
    print(i)



Fixed code:
import math, string, itertools, fractions, heapq, collections, re,  array, bisect, sys, random, time, copy, functools
sys.setrecursionlimit(10**7)
inf = 10 ** 20
eps = 1.0 / 10**10
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 LF(): return [float(x) for x in sys.stdin.readline().split()]
def LS(): return sys.stdin.readline().split()
def I(): return int(sys.stdin.readline())
def F(): return float(sys.stdin.readline())
def pf(s): return print(s, flush=True)


N = I()
b = LI()

result = []
while True:
    #  print(b)
    for i in range(1, len(b)+1):
        #  print(i)
        if b[-i] == len(b)-i+1:
            #  print('break')
            result.append(b[-i])
            del b[-i]
            break
    else:
        if not b:
            break
        print(-1)
        exit()
for i in result[::-1]:
    print(i)