Buggy python submission (verdict: Runtime Error):
import sys
import bisect
import math
import numpy as np
read = sys.stdin.read
readline = sys.stdin.readline
readlines = sys.stdin.readlines
from operator import itemgetter

n,s=map(int,readline().split())
a=list(map(int,readline().split()))
mod=998244353
dp=[[0 for j in range(s+1)] for i in range(n+1)]
dp[0][0]=1
for i in range(n):
    for j in range(s+1):
        dp[i+1][j]+=2*dp[i][j]
        dp[i+1][j]%=mod
        if j+a[i]<=s:
            dp[i+1][j+a[i]]+=dp[i][j]
            dp[i+1][j+a[i]]%=mod
print(dp[n][s])

Fixed submission:
import sys
import bisect
import math
read = sys.stdin.read
readline = sys.stdin.readline
readlines = sys.stdin.readlines
from operator import itemgetter

n,s=map(int,readline().split())
a=list(map(int,readline().split()))
mod=998244353
dp=[[0 for j in range(s+1)] for i in range(n+1)]
dp[0][0]=1
for i in range(n):
    for j in range(s+1):
        dp[i+1][j]+=2*dp[i][j]
        dp[i+1][j]%=mod
        if j+a[i]<=s:
            dp[i+1][j+a[i]]+=dp[i][j]
            dp[i+1][j+a[i]]%=mod
print(dp[n][s])

Buggy python submission (verdict: Runtime Error):
import sys
import bisect
import math
import numpy as np
read = sys.stdin.read
readline = sys.stdin.readline
readlines = sys.stdin.readlines
from operator import itemgetter

n,s=map(int,readline().split())
a=list(map(int,readline().split()))
mod=998244353
dp=np.zeros((3030,3030),np.int64)
dp[0,0]=1
for i in range(n):
    for j in range(s+1):
        dp[i+1,j]+=2*dp[i,j]
        dp[i+1,j]%=mod
        if j+a[i]<=s:
            dp[i+1,j+a[i]]+=dp[i,j]
            dp[i+1,j+a[i]]%=mod
print(dp[n,s])

Fixed submission:
import sys
import bisect
import math
read = sys.stdin.read
readline = sys.stdin.readline
readlines = sys.stdin.readlines
from operator import itemgetter

n,s=map(int,readline().split())
a=list(map(int,readline().split()))
mod=998244353
dp=[[0 for j in range(s+1)] for i in range(n+1)]
dp[0][0]=1
for i in range(n):
    for j in range(s+1):
        dp[i+1][j]+=2*dp[i][j]
        dp[i+1][j]%=mod
        if j+a[i]<=s:
            dp[i+1][j+a[i]]+=dp[i][j]
            dp[i+1][j+a[i]]%=mod
print(dp[n][s])

Buggy python submission (verdict: Time Limit Exceeded):
import sys
import bisect
import math
import numpy as np
read = sys.stdin.read
readline = sys.stdin.readline
readlines = sys.stdin.readlines
from operator import itemgetter

n,s=map(int,readline().split())
a=list(map(int,readline().split()))
mod=998244353
dp=np.zeros((3030,3030),np.int64)
dp[0,0]=1
for i in range(n):
    for j in range(s+1):
        dp[i+1,j]+=2*dp[i,j]
        dp[i+1,j]%=mod
        if j+a[i]<=s:
            dp[i+1,j+a[i]]+=dp[i,j]
            dp[i+1,j+a[i]]%=mod
print(dp[n,s])

Fixed submission:
import sys
import bisect
import math
read = sys.stdin.read
readline = sys.stdin.readline
readlines = sys.stdin.readlines
from operator import itemgetter

n,s=map(int,readline().split())
a=list(map(int,readline().split()))
mod=998244353
dp=[[0 for j in range(s+1)] for i in range(n+1)]
dp[0][0]=1
for i in range(n):
    for j in range(s+1):
        dp[i+1][j]+=2*dp[i][j]
        dp[i+1][j]%=mod
        if j+a[i]<=s:
            dp[i+1][j+a[i]]+=dp[i][j]
            dp[i+1][j+a[i]]%=mod
print(dp[n][s])