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

n, m = map(int, input().split())
a_list = [None] * (m + 2)
a_list[0] = -1
for i in range(m):
    a_list[i+1] = int(input())
a_list[-1] = n + 1

fact_memo = dict()
def fact(n):
    if n in fact_memo.keys():
        return fact_memo[n]
    f = math.factorial(n)
    fact_memo[n] = f
    return f

memo = dict()
ans = 1
cur = a_list[0]
for a in a_list[1:]:
    sub = a - cur - 2
    cur = a
    if sub <= 1:
        if sub == -1:
            print(0)
            sys.exit()
        continue
    if sub in memo.keys():
        ans *= memo[sub]
        continue
    count = sum(fact(sub - j) // fact(j) // fact(sub - j*2) for j in range(sub // 2 + 1))
    memo[sub] = count
    ans *= count
print(ans % 1000000007)


Fixed submission:
import sys
sys.setrecursionlimit(10 ** 6)
readline = sys.stdin.readline

N, M = map(int, readline().split())
ans = [0] * (N + 2)
ans[0] = 1
for _ in range(M):
    a = int(readline())
    ans[a] = -1

for i in range(1, N + 1):
    if ans[i] == -1:
        continue
    a1 = max(ans[i - 2], 0)
    a2 = max(ans[i - 1], 0)
    ans[i] = a1 + a2

print(ans[N] % (10 ** 9 + 7))

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

n, m = map(int, input().split())
a_list = [None] * (m + 2)
a_list[0] = -1
for i in range(m):
    a_list[i+1] = int(input())
a_list[-1] = n + 1

fact_memo = dict()
def fact(n):
    if n in fact_memo.keys():
        return fact_memo[n]
    f = math.factorial(n)
    fact_memo[n] = f
    return f

memo = dict()
ans = 1
cur = a_list[0]
for i, a in enumerate(a_list):
    if i == 0:
        continue
    sub = a - cur - 1
    cur = a
    if sub <= 2:
        if sub == 0:
            print(0)
            sys.exit()
        continue
    sub -= 1
    if sub in memo.keys():
        ans *= memo[sub]
        continue
    count = sum(fact(sub - j) // fact(j) // fact(sub - j*2) for j in range(sub // 2 + 1))
    memo[sub] = count
    ans *= count
print(ans % 1000000007)


Fixed submission:
import sys
sys.setrecursionlimit(10 ** 6)
readline = sys.stdin.readline

N, M = map(int, readline().split())
ans = [0] * (N + 2)
ans[0] = 1
for _ in range(M):
    a = int(readline())
    ans[a] = -1

for i in range(1, N + 1):
    if ans[i] == -1:
        continue
    a1 = max(ans[i - 2], 0)
    a2 = max(ans[i - 1], 0)
    ans[i] = a1 + a2

print(ans[N] % (10 ** 9 + 7))

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

n, m = map(int, input().split())
a_list = [None] * (m + 2)
a_list[0] = -1
for i in range(m):
    a_list[i+1] = int(input())
a_list[-1] = n + 1

fact_memo = dict()
def fact(n):
    if n in fact_memo.keys():
        return fact_memo[n]
    f = math.factorial(n)
    fact_memo[n] = f
    return f

memo = dict()
ans = 1
cur = a_list[0]
for i, a in enumerate(a_list):
    if i == 0:
        continue
    sub = a - cur - 1
    cur = a
    if sub <= 2:
        if sub == 0:
            print(0)
            sys.exit()
        continue
    sub -= 1
    if sub in memo.keys():
        ans *= memo[sub]
        continue
    count = 0
    for j in range(sub // 2 + 1):
        count += fact(sub - j) // fact(j) // fact(sub - j * 2)
    memo[sub] = count
    ans *= count
print(ans % 1000000007)


Fixed submission:
import sys
sys.setrecursionlimit(10 ** 6)
readline = sys.stdin.readline

N, M = map(int, readline().split())
ans = [0] * (N + 2)
ans[0] = 1
for _ in range(M):
    a = int(readline())
    ans[a] = -1

for i in range(1, N + 1):
    if ans[i] == -1:
        continue
    a1 = max(ans[i - 2], 0)
    a2 = max(ans[i - 1], 0)
    ans[i] = a1 + a2

print(ans[N] % (10 ** 9 + 7))

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

n, m = map(int, input().split())
a_list = [-1]
for _ in range(m):
    a_list.append(int(input()))
a_list.append(n + 1)

fact_memo = dict()
def fact(n):
    if n in fact_memo.keys():
        return fact_memo[n]
    f = math.factorial(n)
    fact_memo[n] = f
    return f

memo = dict()
ans = 1
cur = a_list[0]
for i, a in enumerate(a_list):
    if i == 0:
        continue
    sub = a - cur - 1
    cur = a
    if sub <= 2:
        if sub == 0:
            print(0)
            sys.exit()
        continue
    sub -= 1
    if sub in memo.keys():
        ans *= memo[sub]
        continue
    count = 0
    for j in range(sub // 2 + 1):
        count += fact(sub - j) // fact(j) // fact(sub - j * 2)
    memo[sub] = count
    ans *= count
print(ans % 1000000007)


Fixed submission:
import sys
sys.setrecursionlimit(10 ** 6)
readline = sys.stdin.readline

N, M = map(int, readline().split())
ans = [0] * (N + 2)
ans[0] = 1
for _ in range(M):
    a = int(readline())
    ans[a] = -1

for i in range(1, N + 1):
    if ans[i] == -1:
        continue
    a1 = max(ans[i - 2], 0)
    a2 = max(ans[i - 1], 0)
    ans[i] = a1 + a2

print(ans[N] % (10 ** 9 + 7))

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

n, m = map(int, input().split())
a_list = [-1]
for _ in range(m):
    a_list.append(int(input()))
a_list.append(n + 1)

memo = dict()
ans = 1
cur = a_list[0]
for i, a in enumerate(a_list):
    if i == 0:
        continue
    sub = a - cur - 1
    cur = a
    if sub <= 2:
        if sub == 0:
            print(0)
            sys.exit()
        continue
    sub -= 1
    if sub in memo.keys():
        ans *= memo[sub]
        continue
    count = 0
    for j in range(sub // 2 + 1):
        count += math.factorial(sub - j) // math.factorial(j) // math.factorial(sub - j * 2)
    memo[sub] = count
    ans *= count
print(ans % 1000000007)


Fixed submission:
import sys
sys.setrecursionlimit(10 ** 6)
readline = sys.stdin.readline

N, M = map(int, readline().split())
ans = [0] * (N + 2)
ans[0] = 1
for _ in range(M):
    a = int(readline())
    ans[a] = -1

for i in range(1, N + 1):
    if ans[i] == -1:
        continue
    a1 = max(ans[i - 2], 0)
    a2 = max(ans[i - 1], 0)
    ans[i] = a1 + a2

print(ans[N] % (10 ** 9 + 7))

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

n, m = map(int, input().split())
a_list = [-1]
for _ in range(m):
    a_list.append(int(input()))
a_list.append(n + 1)

memo = dict()
ans = 1
for i in range(1, len(a_list)):
    sub = a_list[i] - a_list[i-1] - 1
    if sub == 0:
        print(0)
        sys.exit()
    if sub <= 2:
        continue
    sub -= 1
    if sub in memo.keys():
        ans *= memo[sub]
        continue
    count = 0
    for j in range(sub // 2 + 1):
        count += math.factorial(sub - j) // math.factorial(j) // math.factorial(sub - j * 2)
    memo[sub] = count
    ans *= count
print(ans % 1000000007)


Fixed submission:
import sys
sys.setrecursionlimit(10 ** 6)
readline = sys.stdin.readline

N, M = map(int, readline().split())
ans = [0] * (N + 2)
ans[0] = 1
for _ in range(M):
    a = int(readline())
    ans[a] = -1

for i in range(1, N + 1):
    if ans[i] == -1:
        continue
    a1 = max(ans[i - 2], 0)
    a2 = max(ans[i - 1], 0)
    ans[i] = a1 + a2

print(ans[N] % (10 ** 9 + 7))

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

n, m = map(int, input().split())
a_list = [-1]
for _ in range(m):
    a_list.append(int(input()))
a_list.append(n + 1)

ans = 1
for i in range(1, len(a_list)):
    sub = a_list[i] - a_list[i-1] - 1
    if i > 1 and sub == 0:
        print(0)
        sys.exit()
    if sub <= 2:
        continue
    sub -= 1
    count = 0
    for j in range(sub // 2 + 1):
        count += math.factorial(sub - j) // math.factorial(j) // math.factorial(sub - j * 2)
    ans *= count
print(ans % 1000000007)


Fixed submission:
import sys
sys.setrecursionlimit(10 ** 6)
readline = sys.stdin.readline

N, M = map(int, readline().split())
ans = [0] * (N + 2)
ans[0] = 1
for _ in range(M):
    a = int(readline())
    ans[a] = -1

for i in range(1, N + 1):
    if ans[i] == -1:
        continue
    a1 = max(ans[i - 2], 0)
    a2 = max(ans[i - 1], 0)
    ans[i] = a1 + a2

print(ans[N] % (10 ** 9 + 7))

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

n, m = map(int, input().split())
a_list = [-1]
for _ in range(m):
    a_list.append(int(input()))
a_list.append(n + 1)

patterns = []
for i in range(1, len(a_list)):
    sub = a_list[i] - a_list[i-1] - 1
    if i > 1 and sub == 0:
        print(0)
        sys.exit()
    if sub <= 2:
        continue
    sub -= 1
    count = 0
    for j in range(sub // 2 + 1):
        count += math.factorial(sub - j) // math.factorial(j) // math.factorial(sub - j * 2)
    patterns.append(count)
count = 1
for p in patterns:
    count *= p
print(count % 1000000007)


Fixed submission:
import sys
sys.setrecursionlimit(10 ** 6)
readline = sys.stdin.readline

N, M = map(int, readline().split())
ans = [0] * (N + 2)
ans[0] = 1
for _ in range(M):
    a = int(readline())
    ans[a] = -1

for i in range(1, N + 1):
    if ans[i] == -1:
        continue
    a1 = max(ans[i - 2], 0)
    a2 = max(ans[i - 1], 0)
    ans[i] = a1 + a2

print(ans[N] % (10 ** 9 + 7))