Buggy python submission (verdict: Time Limit Exceeded):
import collections
import sys

n = int(input())
d = list(map(int, input().split()))


if d[0]!=0:
    print(0)
    sys.exit(0)

p=1

for i in range(1,max(d)+1):
        p = (p * pow(d.count(i-1), d.count(i), 998244353))%998244353

print(p)

Fixed submission:
import collections
import sys

n = int(input())
d = list(map(int, input().split()))

cnt = collections.Counter(d)

if d[0]!=0:
    print(0)
    sys.exit(0)

if cnt[0]!=1:
    print(0)
    sys.exit(0)    
    
p = 1

for i in range(1,max(d)+1):
    if cnt[i] == 0:
        print(0)
        sys.exit(0)  
    else:
        p = (p * pow(cnt[i-1], cnt[i], 998244353))%998244353

print(p)

Buggy python submission (verdict: Time Limit Exceeded):
import collections
import sys

n = int(input())
d = list(map(int, input().split()))


if d[0]!=0:
    print(0)
    sys.exit(0)

p=1

for i in range(1,max(d)+1):
    if d.count(i)==0:
        print(0)
        sys.exit(0)
    elif d[i]==0:
        print(0)
        sys.exit(0)
    else:
        p = (p * pow(d.count(i-1), d.count(i), 998244353))%998244353

print(p)

Fixed submission:
import collections
import sys

n = int(input())
d = list(map(int, input().split()))

cnt = collections.Counter(d)

if d[0]!=0:
    print(0)
    sys.exit(0)

if cnt[0]!=1:
    print(0)
    sys.exit(0)    
    
p = 1

for i in range(1,max(d)+1):
    if cnt[i] == 0:
        print(0)
        sys.exit(0)  
    else:
        p = (p * pow(cnt[i-1], cnt[i], 998244353))%998244353

print(p)

Buggy python submission (verdict: Time Limit Exceeded):
import collections
import sys
n = int(input())
d = list(map(int, input().split()))


if d[0]!=0:
    print(0)
    sys.exit(0)
    

m=[1]
p=1


for i in range(1,max(d)+1):
    if d.count(i)==0:
        print(0)
        sys.exit(0)
    elif d[i]==0:
        print(0)
        sys.exit(0)
    else:
        tmp = 1
        for j in range(d.count(i)):
            tmp = (tmp * d.count(i-1)%998244353)%998244353
            
        p = (p * tmp)%998244353
    

print(p)

Fixed submission:
import collections
import sys

n = int(input())
d = list(map(int, input().split()))

cnt = collections.Counter(d)

if d[0]!=0:
    print(0)
    sys.exit(0)

if cnt[0]!=1:
    print(0)
    sys.exit(0)    
    
p = 1

for i in range(1,max(d)+1):
    if cnt[i] == 0:
        print(0)
        sys.exit(0)  
    else:
        p = (p * pow(cnt[i-1], cnt[i], 998244353))%998244353

print(p)

Buggy python submission (verdict: Time Limit Exceeded):
import collections
import sys
n = int(input())
d = list(map(int, input().split()))


if d[0]!=0:
    print(0)
    sys.exit(0)
    

m=[1]
p=1


for i in range(1,max(d)+1):
    if collections.Counter(d)[i]==0:
        print(0)
        sys.exit(0)
    elif d[i]==0:
        print(0)
        sys.exit(0)
    else:
        tmp = 1
        for j in range(collections.Counter(d)[i]):
            tmp = (tmp * collections.Counter(d)[i-1]%998244353)%998244353
            
        p = (p * tmp)%998244353
    

print(p)

Fixed submission:
import collections
import sys

n = int(input())
d = list(map(int, input().split()))

cnt = collections.Counter(d)

if d[0]!=0:
    print(0)
    sys.exit(0)

if cnt[0]!=1:
    print(0)
    sys.exit(0)    
    
p = 1

for i in range(1,max(d)+1):
    if cnt[i] == 0:
        print(0)
        sys.exit(0)  
    else:
        p = (p * pow(cnt[i-1], cnt[i], 998244353))%998244353

print(p)

Buggy python submission (verdict: Time Limit Exceeded):
import collections
import sys
n = int(input())
d = list(map(int, input().split()))

m=[1]
p=1


for i in range(1,max(d)+1):
    if collections.Counter(d)[i]==0:
        print(0)
        sys.exit(0)
    elif d[i]==0:
        print(0)
        sys.exit(0)
    else:
        m.append(collections.Counter(d)[i]) 
    
for i in range(1, len(collections.Counter(d))):
    p = ((p%998244353) * ((m[i-1]**m[i])%998244353))%998244353
    
    

if d[0]!=0:
    print(0)
    sys.exit(0)
    
print(p%998244353)

Fixed submission:
import collections
import sys

n = int(input())
d = list(map(int, input().split()))

cnt = collections.Counter(d)

if d[0]!=0:
    print(0)
    sys.exit(0)

if cnt[0]!=1:
    print(0)
    sys.exit(0)    
    
p = 1

for i in range(1,max(d)+1):
    if cnt[i] == 0:
        print(0)
        sys.exit(0)  
    else:
        p = (p * pow(cnt[i-1], cnt[i], 998244353))%998244353

print(p)