Buggy python submission (verdict: Runtime Error):
N = int(input())
Nloop = N + 1
A = [[0] * Nloop for _ in range(Nloop)]

for i in range(1, Nloop):
    Acount = int(input())
    for _ in range(Acount):
        x, y = map(int,input().split())
        A[i, x] = 1 if y == 1 else -1

honest_loop = 2 ** N
is_honest = [False] * Nloop

ans = 0

for i in range(1, honest_loop):
    for l in range(1, Nloop):
        is_honest[l] = (i >> (l - 1) & 1 == 1)

    honest_check = True
    for l in range(1, Nloop):
        # lの人が正直者のとき
        if is_honest[l]:
            # lの人から見てjの人は正直者か？
            for j in range(1, Nloop):
                if A[l, j] == 1:
                    if not is_honest[j]:
                        honest_check = False
                elif A[l, j] == -1:
                    if is_honest[j]:
                        honest_check = False
                if not honest_check:
                    break
        if not honest_check:
            break

    if honest_check:
        ans = max(sum(is_honest), ans)

print(ans)


Fixed submission:
N = int(input())
Nloop = N + 1
A = [[0] * Nloop for _ in range(Nloop)]

for i in range(1, Nloop):
    Acount = int(input())
    for _ in range(Acount):
        x, y = map(int, input().split())
        if y == 1:
            A[i][x] = 1
        else:
            A[i][x] = -1

honest_loop = 2 ** N
is_honest = [False] * Nloop

ans = 0

for i in range(1, honest_loop):
    for l in range(1, Nloop):
        is_honest[l] = (i >> (l - 1) & 1 == 1)

    honest_check = True
    for l in range(1, Nloop):
        # lの人が正直者のとき
        if is_honest[l]:
            # lの人から見てjの人は正直者か？
            for j in range(1, Nloop):
                if A[l][j] == 1:
                    if not is_honest[j]:
                        honest_check = False
                elif A[l][j] == -1:
                    if is_honest[j]:
                        honest_check = False
                if not honest_check:
                    break
        if not honest_check:
            break

    if honest_check:
        ans = max(sum(is_honest), ans)

print(ans)

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

N = int(input())
Nloop = N + 1
A = np.zeros((Nloop, Nloop), dtype="int")
Acount = np.zeros(Nloop, dtype="int")

for i in range(1, Nloop):
    Acount[i] = int(input())
    for _ in range(Acount[i]):
        x, y = map(int, input().split())
        A[i, x] = 1 if y == 1 else -1

honest_loop = 2 ** N
honest_num = np.zeros(Nloop, dtype="int")

ans = 0

for i in range(1, honest_loop):
    for l in range(1, Nloop):
        honest_num[l] = 1 if i >> (l - 1) & 1 == 1 else -1

    check = np.dot(A, honest_num)

    honest_check = True
    for l in range(1, Nloop):
        # lの人が正直者のとき
        if honest_num[l] == 1 and Acount[l] != check[l]:
            honest_check = False

    if honest_check:
        ans = max(sum(honest_num == 1), ans)

print(ans)

Fixed submission:
N = int(input())
Nloop = N + 1
A = [[0] * Nloop for _ in range(Nloop)]

for i in range(1, Nloop):
    Acount = int(input())
    for _ in range(Acount):
        x, y = map(int, input().split())
        if y == 1:
            A[i][x] = 1
        else:
            A[i][x] = -1

honest_loop = 2 ** N
is_honest = [False] * Nloop

ans = 0

for i in range(1, honest_loop):
    for l in range(1, Nloop):
        is_honest[l] = (i >> (l - 1) & 1 == 1)

    honest_check = True
    for l in range(1, Nloop):
        # lの人が正直者のとき
        if is_honest[l]:
            # lの人から見てjの人は正直者か？
            for j in range(1, Nloop):
                if A[l][j] == 1:
                    if not is_honest[j]:
                        honest_check = False
                elif A[l][j] == -1:
                    if is_honest[j]:
                        honest_check = False
                if not honest_check:
                    break
        if not honest_check:
            break

    if honest_check:
        ans = max(sum(is_honest), ans)

print(ans)

Buggy python submission (verdict: Runtime Error):
import numpy as np

N = int(input())
Nloop = N + 1
A = np.zeros((Nloop, Nloop), dtype="int")
Acount = np.zeros(Nloop, dtype="int")

for i in range(1, Nloop):
    Acount[i] = int(input())
    for _ in range(Acount[i]):
        x, y = map(int, input().split())
        A[i, x] = 1 if y == 1 else -1

honest_loop = 2 ** N
honest_num = np.zeros(Nloop, dtype="int")

ans = 0

for i in range(1, honest_loop):
    for l in range(1, Nloop):
        honest_num[l] = 1 if i >> (l - 1) & 1 == 1 else -1

    check = np.dot(A, honest_num)

    honest_check = True
    for l in range(1, Nloop):
        # lの人が正直者のとき
        if honest_num[l] == 1 and Acount[l] != check[l]:
            honest_check = False

    if honest_check:
        ans = max(sum(honest_num == 1), ans)

print(ans)

Fixed submission:
N = int(input())
Nloop = N + 1
A = [[0] * Nloop for _ in range(Nloop)]

for i in range(1, Nloop):
    Acount = int(input())
    for _ in range(Acount):
        x, y = map(int, input().split())
        if y == 1:
            A[i][x] = 1
        else:
            A[i][x] = -1

honest_loop = 2 ** N
is_honest = [False] * Nloop

ans = 0

for i in range(1, honest_loop):
    for l in range(1, Nloop):
        is_honest[l] = (i >> (l - 1) & 1 == 1)

    honest_check = True
    for l in range(1, Nloop):
        # lの人が正直者のとき
        if is_honest[l]:
            # lの人から見てjの人は正直者か？
            for j in range(1, Nloop):
                if A[l][j] == 1:
                    if not is_honest[j]:
                        honest_check = False
                elif A[l][j] == -1:
                    if is_honest[j]:
                        honest_check = False
                if not honest_check:
                    break
        if not honest_check:
            break

    if honest_check:
        ans = max(sum(is_honest), ans)

print(ans)

Buggy python submission (verdict: Runtime Error):
import numpy as np

N = int(input())
Nloop = N + 1
A = np.zeros((Nloop, Nloop), dtype="int")

for i in range(1, Nloop):
    Acount = int(input())
    for _ in range(Acount):
        x, y = map(int,input().split())
        A[i, x] = 1 if y == 1 else -1

honest_loop = 2 ** N
is_honest = np.zeros(Nloop, dtype="bool")

ans = 0

for i in range(1, honest_loop):
    for l in range(1, Nloop):
        is_honest[l] = (i >> (l - 1) & 1 == 1)

    honest_check = True
    for l in range(1, Nloop):
        # lの人が正直者のとき
        if is_honest[l]:
            # lの人から見てjの人は正直者か？
            for j in range(1, Nloop):
                if A[l, j] == 1:
                    if not is_honest[j]:
                        honest_check = False
                elif A[l, j] == -1:
                    if is_honest[j]:
                        honest_check = False
                if not honest_check:
                    break
        if not honest_check:
            break

    if honest_check:
        ans = max(sum(is_honest), ans)

print(ans)

Fixed submission:
N = int(input())
Nloop = N + 1
A = [[0] * Nloop for _ in range(Nloop)]

for i in range(1, Nloop):
    Acount = int(input())
    for _ in range(Acount):
        x, y = map(int, input().split())
        if y == 1:
            A[i][x] = 1
        else:
            A[i][x] = -1

honest_loop = 2 ** N
is_honest = [False] * Nloop

ans = 0

for i in range(1, honest_loop):
    for l in range(1, Nloop):
        is_honest[l] = (i >> (l - 1) & 1 == 1)

    honest_check = True
    for l in range(1, Nloop):
        # lの人が正直者のとき
        if is_honest[l]:
            # lの人から見てjの人は正直者か？
            for j in range(1, Nloop):
                if A[l][j] == 1:
                    if not is_honest[j]:
                        honest_check = False
                elif A[l][j] == -1:
                    if is_honest[j]:
                        honest_check = False
                if not honest_check:
                    break
        if not honest_check:
            break

    if honest_check:
        ans = max(sum(is_honest), ans)

print(ans)

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

N = int(input())
Nloop = N + 1
A = np.zeros((Nloop, Nloop), dtype="int")

for i in range(1, Nloop):
    Acount = int(input())
    for _ in range(Acount):
        x, y = map(int,input().split())
        A[i, x] = 1 if y == 1 else -1

honest_loop = 2 ** N
is_honest = np.zeros(Nloop, dtype="bool")

ans = 0

for i in range(1, honest_loop):
    for l in range(1, Nloop):
        is_honest[l] = (i >> (l - 1) & 1 == 1)

    honest_check = True
    for l in range(1, Nloop):
        # lの人が正直者のとき
        if is_honest[l]:
            # lの人から見てjの人は正直者か？
            for j in range(1, Nloop):
                if A[l, j] == 1:
                    if not is_honest[j]:
                        honest_check = False
                elif A[l, j] == -1:
                    if is_honest[j]:
                        honest_check = False
                if not honest_check:
                    break
        if not honest_check:
            break

    if honest_check:
        ans = max(sum(is_honest), ans)

print(ans)

Fixed submission:
N = int(input())
Nloop = N + 1
A = [[0] * Nloop for _ in range(Nloop)]

for i in range(1, Nloop):
    Acount = int(input())
    for _ in range(Acount):
        x, y = map(int, input().split())
        if y == 1:
            A[i][x] = 1
        else:
            A[i][x] = -1

honest_loop = 2 ** N
is_honest = [False] * Nloop

ans = 0

for i in range(1, honest_loop):
    for l in range(1, Nloop):
        is_honest[l] = (i >> (l - 1) & 1 == 1)

    honest_check = True
    for l in range(1, Nloop):
        # lの人が正直者のとき
        if is_honest[l]:
            # lの人から見てjの人は正直者か？
            for j in range(1, Nloop):
                if A[l][j] == 1:
                    if not is_honest[j]:
                        honest_check = False
                elif A[l][j] == -1:
                    if is_honest[j]:
                        honest_check = False
                if not honest_check:
                    break
        if not honest_check:
            break

    if honest_check:
        ans = max(sum(is_honest), ans)

print(ans)