Buggy python submission (verdict: Time Limit Exceeded):
import numpy as np

MOD = 10 ** 9 + 7
N=int(input())
A = [[int(x) for x in input().split()] for _ in range(N)]

dp = np.zeros(1<<N, dtype=np.uint32)
dp[0] = 1

for A_row in A:
    prev = dp.copy()
    dp = np.zeros_like(prev)
    for n,a in enumerate(A_row):
        if not a:
            continue
        x = 1 << n
        dp[x:] += prev[:-x]
        dp[dp>MOD] -= MOD

answer = dp[-1]
print(answer)


Fixed submission:
import sys
input = sys.stdin.readline
sys.setrecursionlimit(10 ** 7)

MOD = 10 ** 9 + 7
N = int(input())
A = [[int(x) for x in input().split()] for _ in range(N)]

bit_count = [0]
for _ in range(N):
    bit_count += [x+1 for x in bit_count]
    
dp = [0] * (1<<N)
dp[0] = 1

for i in range((1<<N)-1):
    k = bit_count[i]
    for c in range(N):
        if A[k][c]:
            dp[(1<<c)^i] += dp[i]

answer = dp[-1] % MOD
print(answer)

Buggy python submission (verdict: Time Limit Exceeded):
import sys
input = sys.stdin.readline

MOD = 10 ** 9 + 7
N = int(input())
A = [[int(x) for x in input().split()] for _ in range(N)]

bit_to_i = {1<<i:i for i in range(N)}
  
dp = [0] * (1<<N)
dp[0] = 1

for n in range(1,1<<N):
    m = n
    xs = []
    while m:
        x = m&(-m)
        xs.append(x)
        m -= x
    k = len(xs)
    dp[n] = sum(dp[n-x] for x in xs if A[k-1][bit_to_i[x]]) % MOD

answer = dp[-1]
print(answer)

Fixed submission:
import sys
input = sys.stdin.readline
sys.setrecursionlimit(10 ** 7)

MOD = 10 ** 9 + 7
N = int(input())
A = [[int(x) for x in input().split()] for _ in range(N)]

bit_count = [0]
for _ in range(N):
    bit_count += [x+1 for x in bit_count]
    
dp = [0] * (1<<N)
dp[0] = 1

for i in range((1<<N)-1):
    k = bit_count[i]
    for c in range(N):
        if A[k][c]:
            dp[(1<<c)^i] += dp[i]

answer = dp[-1] % MOD
print(answer)

Buggy python submission (verdict: Runtime Error):
import sys
import numpy as np
input = sys.stdin.readline
sys.setrecursionlimit(10 ** 7)

MOD = 10 ** 9 + 7
N = int(input())
A = [[int(x) for x in input().split()] for _ in range(N)]

bit_to_i = {1<<i:i for i in range(N)}

dp = [0] * (1<<N)
dp[0] = 1

for n in range(1,1<<N):
    bits = []
    m = n
    while n:
        x = n & (-n)
        bits.append(x)
        n -= x
    n = m
    k = len(bits)
    dp[n] = sum(dp[n-x] for x in bits if A[k-1][bit_to_i[x]]) % MOD

answer = dp[-1]
print(answer)

Fixed submission:
import sys
input = sys.stdin.readline
sys.setrecursionlimit(10 ** 7)

MOD = 10 ** 9 + 7
N = int(input())
A = [[int(x) for x in input().split()] for _ in range(N)]

bit_count = [0]
for _ in range(N):
    bit_count += [x+1 for x in bit_count]
    
dp = [0] * (1<<N)
dp[0] = 1

for i in range((1<<N)-1):
    k = bit_count[i]
    for c in range(N):
        if A[k][c]:
            dp[(1<<c)^i] += dp[i]

answer = dp[-1] % MOD
print(answer)

Buggy python submission (verdict: Time Limit Exceeded):
import sys
import numpy as np
input = sys.stdin.readline
sys.setrecursionlimit(10 ** 7)

MOD = 10 ** 9 + 7
N=int(input())
A = [[int(x) for x in input().split()] for _ in range(N)]

dp = np.zeros(1<<N, dtype=np.uint32)
dp[0] = 1

for A_row in A:
    prev = dp.copy()
    dp = np.zeros_like(prev)
    for n,a in enumerate(A_row):
        if a == 0:
            continue
        x = 1<<n
        dp = dp.reshape(-1,2*x)
        prev = prev.reshape(-1,2*x)
        dp[:,x:] += prev[:,:-x]
        dp = dp.ravel()
        prev = prev.ravel()
        dp[dp >= MOD] -= MOD

answer = dp[-1]
print(answer)

Fixed submission:
import sys
input = sys.stdin.readline
sys.setrecursionlimit(10 ** 7)

MOD = 10 ** 9 + 7
N = int(input())
A = [[int(x) for x in input().split()] for _ in range(N)]

bit_count = [0]
for _ in range(N):
    bit_count += [x+1 for x in bit_count]
    
dp = [0] * (1<<N)
dp[0] = 1

for i in range((1<<N)-1):
    k = bit_count[i]
    for c in range(N):
        if A[k][c]:
            dp[(1<<c)^i] += dp[i]

answer = dp[-1] % MOD
print(answer)

Buggy python submission (verdict: Time Limit Exceeded):
import sys
import numpy as np
input = sys.stdin.readline
sys.setrecursionlimit(10 ** 7)

MOD = 10 ** 9 + 7
N=int(input())
A = [[int(x) for x in input().split()] for _ in range(N)]

dp = np.zeros(1<<N, dtype=np.int64)
dp[0] = 1

for A_row in A:
    prev = dp.copy()
    dp = np.zeros_like(prev)
    for n,a in enumerate(A_row):
        if a == 0:
            continue
        x = 1<<n
        dp = dp.reshape(-1,2*x)
        prev = prev.reshape(-1,2*x)
        dp[:,x:] += prev[:,:-x]
        dp = dp.ravel()
        prev = prev.ravel()
    dp %= MOD

answer = dp[-1]
print(answer)

Fixed submission:
import sys
input = sys.stdin.readline
sys.setrecursionlimit(10 ** 7)

MOD = 10 ** 9 + 7
N = int(input())
A = [[int(x) for x in input().split()] for _ in range(N)]

bit_count = [0]
for _ in range(N):
    bit_count += [x+1 for x in bit_count]
    
dp = [0] * (1<<N)
dp[0] = 1

for i in range((1<<N)-1):
    k = bit_count[i]
    for c in range(N):
        if A[k][c]:
            dp[(1<<c)^i] += dp[i]

answer = dp[-1] % MOD
print(answer)

Buggy python submission (verdict: Time Limit Exceeded):
import sys
import numpy as np
input = sys.stdin.readline
sys.setrecursionlimit(10 ** 7)

MOD = 10 ** 9 + 7
N=int(input())
A = [[int(x) for x in input().split()] for _ in range(N)]

dp = np.zeros(1<<N, dtype=np.int64)
dp[0] = 1

for A_row in A:
    prev = dp.copy()
    dp = np.zeros_like(prev)
    for n,a in enumerate(A_row):
        if a == 0:
            continue
        x = 1 << n
        dp[x:] += prev[:-x]
    dp %= MOD

answer = dp[-1]
print(answer)

Fixed submission:
import sys
input = sys.stdin.readline
sys.setrecursionlimit(10 ** 7)

MOD = 10 ** 9 + 7
N = int(input())
A = [[int(x) for x in input().split()] for _ in range(N)]

bit_count = [0]
for _ in range(N):
    bit_count += [x+1 for x in bit_count]
    
dp = [0] * (1<<N)
dp[0] = 1

for i in range((1<<N)-1):
    k = bit_count[i]
    for c in range(N):
        if A[k][c]:
            dp[(1<<c)^i] += dp[i]

answer = dp[-1] % MOD
print(answer)