Buggy python submission (verdict: Runtime Error):
from itertools import groupby
inputs = open(0).readlines()

n = int(inputs[0])
*D, = map(int, inputs[1].split())
D.sort()
mod = 998244353

keys, nodes = [], [] 
for k, g in groupby(D):
    keys.append(k)
    nodes.append(len(list(g)))

if nodes[0] == 1 and all(i == k for i, k in enumerate(keys)):
    ans = 1
    for n0, n1 in zip(nodes, nodes[1:]):
        patterns.append(patterns[-1] * pow(n0, n1, mod) % mod)
        ans = ans * pow(n0, n1, mod) % mod
    print(ans)
else:
    print(0)

Fixed submission:
from collections import Counter
inputs = open(0).readlines()

n = int(inputs[0])
*D, = map(int, inputs[1].split())
mod = 998244353

nbs = [0] * (max(D)+1)
for k, v in Counter(D).items():
    nbs[k] = v

if D[0] != 0 or nbs[0] != 1:
    print(0)
else:
    ans = 1
    for n0, n1 in zip(nbs, nbs[1:]):
        ans = ans * pow(n0, n1, mod) % mod
    print(ans)

Buggy python submission (verdict: Runtime Error):
n = int(inputs[0])
n, *D = map(int, open(0).read().split())
D.sort()
mod = 998244353

keys = [k for k, g in groupby(D)]
nodes = [len(list(g)) for k, g in groupby(D)]

if nodes[0] != 1:
    print(0)
else:
    patterns = [1]
    for i, (k, n0, n1) in enumerate(zip(keys, nodes, nodes[1:])):
        if i != k:
            print(0)
            break
        patterns.append(patterns[i] * pow(n0, n1, mod) % mod)
    else:
        print(patterns[-1])

Fixed submission:
from collections import Counter
inputs = open(0).readlines()

n = int(inputs[0])
*D, = map(int, inputs[1].split())
mod = 998244353

nbs = [0] * (max(D)+1)
for k, v in Counter(D).items():
    nbs[k] = v

if D[0] != 0 or nbs[0] != 1:
    print(0)
else:
    ans = 1
    for n0, n1 in zip(nbs, nbs[1:]):
        ans = ans * pow(n0, n1, mod) % mod
    print(ans)

Buggy python submission (verdict: Runtime Error):
n = int(inputs[0])
*D, = map(int, inputs[1].split())
D.sort()
mod = 998244353

keys = [k for k, g in groupby(D)]
nodes = [len(list(g)) for k, g in groupby(D)]

if nodes[0] != 1:
    print(0)
else:
    patterns = [1]
    for i, (k, n0, n1) in enumerate(zip(keys, nodes, nodes[1:])):
        if i != k:
            print(0)
            break
        patterns.append(patterns[i] * pow(n0, n1, mod) % mod)
    else:
        print(patterns[-1])

Fixed submission:
from collections import Counter
inputs = open(0).readlines()

n = int(inputs[0])
*D, = map(int, inputs[1].split())
mod = 998244353

nbs = [0] * (max(D)+1)
for k, v in Counter(D).items():
    nbs[k] = v

if D[0] != 0 or nbs[0] != 1:
    print(0)
else:
    ans = 1
    for n0, n1 in zip(nbs, nbs[1:]):
        ans = ans * pow(n0, n1, mod) % mod
    print(ans)

Buggy python submission (verdict: Runtime Error):
n = int(inputs[0])
D = list(map(int, inputs[1].split()))

if (D[0] != 0):
    print(0)
else:
    c = Counter(D)
    if (c[0] > 1):
        print(0)
    else:
        ans = 1
        for i in range(1,max(D)+1):
            ans *= c[i-1]**c[i]
        print(ans % 998244353)

Fixed submission:
from collections import Counter
inputs = open(0).readlines()

n = int(inputs[0])
*D, = map(int, inputs[1].split())
mod = 998244353

nbs = [0] * (max(D)+1)
for k, v in Counter(D).items():
    nbs[k] = v

if D[0] != 0 or nbs[0] != 1:
    print(0)
else:
    ans = 1
    for n0, n1 in zip(nbs, nbs[1:]):
        ans = ans * pow(n0, n1, mod) % mod
    print(ans)

Buggy python submission (verdict: Runtime Error):
from collections import Counter
import sys
inputs = sys.stdin.readlines()

n = int(inputs[0]())
D = list(map(int, inputs[1]().split()))

if (D[0] != 0):
    print(0)
else:
    c = Counter(D)
    if (c[0] > 1):
        print(0)
    else:
        ans = 1
        for i in range(1,max(D)+1):
            ans *= c[i-1]**c[i]
        print(ans % 998244353)

Fixed submission:
from collections import Counter
inputs = open(0).readlines()

n = int(inputs[0])
*D, = map(int, inputs[1].split())
mod = 998244353

nbs = [0] * (max(D)+1)
for k, v in Counter(D).items():
    nbs[k] = v

if D[0] != 0 or nbs[0] != 1:
    print(0)
else:
    ans = 1
    for n0, n1 in zip(nbs, nbs[1:]):
        ans = ans * pow(n0, n1, mod) % mod
    print(ans)

Buggy python submission (verdict: Runtime Error):
import sys
inputs = sys.stdin.readlines()
from collections import Counter

n = int(inputs[0])
D = list(map(int, inputs[1].split()))
MOD = 998244353
cnt = Counter(D)
if (D[0] != 0 or c[0] > 1):
    print(0)
else:
    ans = 1
    for i in range(1, max(D)+1):
        ans *= pow(cnt[i-1], cnt[i], MOD) % MOD
    print(ans)

Fixed submission:
from collections import Counter
inputs = open(0).readlines()

n = int(inputs[0])
*D, = map(int, inputs[1].split())
mod = 998244353

nbs = [0] * (max(D)+1)
for k, v in Counter(D).items():
    nbs[k] = v

if D[0] != 0 or nbs[0] != 1:
    print(0)
else:
    ans = 1
    for n0, n1 in zip(nbs, nbs[1:]):
        ans = ans * pow(n0, n1, mod) % mod
    print(ans)

Buggy python submission (verdict: Runtime Error):
import sys
from collections import Counter
inputs = sys.stdin.readlines()

n = int(inputs[0])
A = list(map(int, inputs[1].split()))
MOD = 998244353
B = [v for k, v in sorted(Counter(A).items())]
if A[0] != 0 or not all(A[1:]) or not all(m):
    print(0)
else:
    t, r = 1
    for b in B:
        t *= pow(r, b, MOD) % MOD
        r = b
    print(t)

Fixed submission:
from collections import Counter
inputs = open(0).readlines()

n = int(inputs[0])
*D, = map(int, inputs[1].split())
mod = 998244353

nbs = [0] * (max(D)+1)
for k, v in Counter(D).items():
    nbs[k] = v

if D[0] != 0 or nbs[0] != 1:
    print(0)
else:
    ans = 1
    for n0, n1 in zip(nbs, nbs[1:]):
        ans = ans * pow(n0, n1, mod) % mod
    print(ans)

Buggy python submission (verdict: Runtime Error):
n = int(inputs[0])
A = list(map(int, inputs[1].split()))
MOD = 998244353
B = [v for k, v in sorted(Counter(A).items())]
if A[0] != 0 or not all(A[1:]) or not all(m):
    print(0)
else:
    t, r = 1
    for b in B:
        t *= pow(r, b, MOD) % MOD
        r = b
    print(t)

Fixed submission:
from collections import Counter
inputs = open(0).readlines()

n = int(inputs[0])
*D, = map(int, inputs[1].split())
mod = 998244353

nbs = [0] * (max(D)+1)
for k, v in Counter(D).items():
    nbs[k] = v

if D[0] != 0 or nbs[0] != 1:
    print(0)
else:
    ans = 1
    for n0, n1 in zip(nbs, nbs[1:]):
        ans = ans * pow(n0, n1, mod) % mod
    print(ans)