Buggy python submission (verdict: Runtime Error):
# -*- coding: utf-8 -*-
from math import factorial

N, M = map(int, input().split())
a = [int(input()) for x in range(M)]

def calc_routes(dan):
    tmp = 1
    for i in range(int(dan/2)):
        i += 1
        n = dan - i
        tmp += factorial(n) / factorial(i) / factorial(n - i)

    return tmp

routes = 1
prev = 0
for x in a:
    if x == prev:
        routes = 0
        break
    else:
        dan = (x-1) - prev
        routes = (routes * calc_routes(dan)) % 1000000007
        prev = x+1

routes = (routes * calc_routes(N-prev)) % 1000000007
print(int(routes))

Fixed submission:
# -*- coding: utf-8 -*-
from math import factorial

N, M = map(int, input().split())
a = [int(input()) for x in range(M)]

def fibo(dan):
    tmp = [1, 1]
    for i in range(2, dan+1):
        tmp.append(tmp[i-1] + tmp[i-2])
    return tmp[dan]

routes = 1
prev = 0
for x in a:
    if x == prev:
        routes = 0
        break
    else:
        dan = (x-1) - prev
        routes = (routes * fibo(dan))
        prev = x+1

routes = (routes * fibo(N-prev)) % 1000000007
print(int(routes))

Buggy python submission (verdict: Time Limit Exceeded):
# -*- coding: utf-8 -*-

from operator import mul
from functools import reduce

N, M = map(int, input().split())
a = [int(input()) for x in range(M)]


def cmb(n, r):
    if n - r < r: r = n - r
    if r == 0: return 1
    if r == 1: return n

    numerator = [n - r + k + 1 for k in range(r)]
    denominator = [k + 1 for k in range(r)]

    for p in range(2,r+1):
        pivot = denominator[p - 1]
        if pivot > 1:
            offset = (n - r) % p
            for k in range(p-1,r,p):
                numerator[k - offset] /= pivot
                denominator[k] /= pivot

    result = 1
    for k in range(r):
        if numerator[k] > 1:
            result *= int(numerator[k])

    return result

def calc_routes(dan):
    tmp = 1
    for i in range(int(dan/2)):
        i += 1
        n = dan - i
        # tmp += factorial(n) / factorial(i) / factorial(n - i)
        tmp += cmb(n, i)

    return tmp

routes = 1
prev = 0
for x in a:
    if x == prev:
        routes = 0
        break
    else:
        dan = (x-1) - prev
        routes = (routes * calc_routes(dan)) % 1000000007
        prev = x+1

routes = (routes * calc_routes(N-prev)) % 1000000007
print(int(routes))

Fixed submission:
# -*- coding: utf-8 -*-
from math import factorial

N, M = map(int, input().split())
a = [int(input()) for x in range(M)]

def fibo(dan):
    tmp = [1, 1]
    for i in range(2, dan+1):
        tmp.append(tmp[i-1] + tmp[i-2])
    return tmp[dan]

routes = 1
prev = 0
for x in a:
    if x == prev:
        routes = 0
        break
    else:
        dan = (x-1) - prev
        routes = (routes * fibo(dan))
        prev = x+1

routes = (routes * fibo(N-prev)) % 1000000007
print(int(routes))

Buggy python submission (verdict: Time Limit Exceeded):
# -*- coding: utf-8 -*-

from operator import mul
from functools import reduce

N, M = map(int, input().split())
a = [int(input()) for x in range(M)]


def cmb(n,r):
    r = min(n-r,r)
    if r == 0: return 1
    over = reduce(mul, range(n, n - r, -1))
    under = reduce(mul, range(1,r + 1))
    return over // under

def calc_routes(dan):
    tmp = 1
    for i in range(int(dan/2)):
        i += 1
        n = dan - i
        # tmp += factorial(n) / factorial(i) / factorial(n - i)
        tmp += cmb(n, i)

    return tmp

routes = 1
prev = 0
for x in a:
    if x == prev:
        routes = 0
        break
    else:
        dan = (x-1) - prev
        routes = (routes * calc_routes(dan)) % 1000000007
        prev = x+1

routes = (routes * calc_routes(N-prev)) % 1000000007
print(int(routes))

Fixed submission:
# -*- coding: utf-8 -*-
from math import factorial

N, M = map(int, input().split())
a = [int(input()) for x in range(M)]

def fibo(dan):
    tmp = [1, 1]
    for i in range(2, dan+1):
        tmp.append(tmp[i-1] + tmp[i-2])
    return tmp[dan]

routes = 1
prev = 0
for x in a:
    if x == prev:
        routes = 0
        break
    else:
        dan = (x-1) - prev
        routes = (routes * fibo(dan))
        prev = x+1

routes = (routes * fibo(N-prev)) % 1000000007
print(int(routes))

Buggy python submission (verdict: Runtime Error):
# -*- coding: utf-8 -*-
from math import factorial

N, M = map(int, input().split())
a = [int(input()) for x in range(M)]

def fibo(dan):
    if dan == 0 or dan == 1: return 1
    else: return fibo(dan-1) + fibo(dan-2)

routes = 1
prev = 0
for x in a:
    if x == prev:
        routes = 0
        break
    else:
        dan = (x-1) - prev
        routes = (routes * fibo(dan))
        prev = x+1

routes = (routes * fibo(N-prev)) % 1000000007
print(int(routes))

Fixed submission:
# -*- coding: utf-8 -*-
from math import factorial

N, M = map(int, input().split())
a = [int(input()) for x in range(M)]

def fibo(dan):
    tmp = [1, 1]
    for i in range(2, dan+1):
        tmp.append(tmp[i-1] + tmp[i-2])
    return tmp[dan]

routes = 1
prev = 0
for x in a:
    if x == prev:
        routes = 0
        break
    else:
        dan = (x-1) - prev
        routes = (routes * fibo(dan))
        prev = x+1

routes = (routes * fibo(N-prev)) % 1000000007
print(int(routes))

Buggy python submission (verdict: Runtime Error):
# -*- coding: utf-8 -*-
from math import factorial

N, M = map(int, input().split())
a = [int(input()) for x in range(M)]

def fibo(dan):
    if dan == 0 or dan == 1: return 1
    else: return fibo(dan-1) + fibo(dan-2)

routes = 1
prev = 0
for x in a:
    if x == prev:
        routes = 0
        break
    else:
        dan = (x-1) - prev
        routes = (routes * fibo(dan)) % 1000000007
        prev = x+1

routes = (routes * fibo(N-prev)) % 1000000007
print(int(routes))

Fixed submission:
# -*- coding: utf-8 -*-
from math import factorial

N, M = map(int, input().split())
a = [int(input()) for x in range(M)]

def fibo(dan):
    tmp = [1, 1]
    for i in range(2, dan+1):
        tmp.append(tmp[i-1] + tmp[i-2])
    return tmp[dan]

routes = 1
prev = 0
for x in a:
    if x == prev:
        routes = 0
        break
    else:
        dan = (x-1) - prev
        routes = (routes * fibo(dan))
        prev = x+1

routes = (routes * fibo(N-prev)) % 1000000007
print(int(routes))

Buggy python submission (verdict: Runtime Error):
# -*- coding: utf-8 -*-
from math import factorial

N, M = map(int, input().split())
a = [int(input()) for x in range(M)]

def calc_routes(dan):
    tmp = 1
    for i in range(int(dan/2)):
        i += 1
        n = dan - i
        tmp += factorial(n) / factorial(i) / factorial(n - i)
        # tmp += len(list(itr.combinations(range(n), i)))

    return tmp

routes = 1
prev = 0
for x in a:
    if x == prev:
        routes = 0
        break
    else:
        dan = (x-1) - prev
        routes = (routes * calc_routes(dan)) % 1000000007
        prev = x+1

routes = (routes * calc_routes(N-prev)) % 1000000007
print(int(routes))

Fixed submission:
# -*- coding: utf-8 -*-
from math import factorial

N, M = map(int, input().split())
a = [int(input()) for x in range(M)]

def fibo(dan):
    tmp = [1, 1]
    for i in range(2, dan+1):
        tmp.append(tmp[i-1] + tmp[i-2])
    return tmp[dan]

routes = 1
prev = 0
for x in a:
    if x == prev:
        routes = 0
        break
    else:
        dan = (x-1) - prev
        routes = (routes * fibo(dan))
        prev = x+1

routes = (routes * fibo(N-prev)) % 1000000007
print(int(routes))

Buggy python submission (verdict: Time Limit Exceeded):
# -*- coding: utf-8 -*-
import itertools as itr

N, M = map(int, input().split())
a = [int(input()) for x in range(M)]

def calc_routes(dan):
    tmp = 1
    for i in range(int(dan/2)):
        i += 1
        n = dan - i
        tmp += len(list(itr.combinations(range(n), i)))

    return tmp

routes = 1
prev = 0
for x in a:
    if x == prev:
        routes = 0
        break
    else:
        dan = (x-1) - prev
        routes = (routes * calc_routes(dan)) % 1000000007
        prev = x+1

routes = (routes * calc_routes(N-prev)) % 1000000007
print(int(routes))

Fixed submission:
# -*- coding: utf-8 -*-
from math import factorial

N, M = map(int, input().split())
a = [int(input()) for x in range(M)]

def fibo(dan):
    tmp = [1, 1]
    for i in range(2, dan+1):
        tmp.append(tmp[i-1] + tmp[i-2])
    return tmp[dan]

routes = 1
prev = 0
for x in a:
    if x == prev:
        routes = 0
        break
    else:
        dan = (x-1) - prev
        routes = (routes * fibo(dan))
        prev = x+1

routes = (routes * fibo(N-prev)) % 1000000007
print(int(routes))

Buggy python submission (verdict: Runtime Error):
# -*- coding: utf-8 -*-
import sys

N, M = map(int, input().split())
a = [int(input()) for x in range(M)]

def calc_routes(dan):
    tmp = 1
    for i in range(int(dan/2)):
        i += 1
        n = dan - i
        tmp2 = 1
        for j in range(i):
            tmp2 *= n - j
        for j in range(i):
            tmp2 /= j + 1
        tmp += tmp2

    return tmp

routes = 1
prev = 0
for x in a:
    if x - prev == 0:
        routes = 0
        break
    else:
        x -= 1
        dan = x - prev
        routes = (routes * calc_routes(dan)) % 1000000007
        prev = x+2

routes = (routes * calc_routes(N-prev)) % 1000000007
print(int(routes))

Fixed submission:
# -*- coding: utf-8 -*-
from math import factorial

N, M = map(int, input().split())
a = [int(input()) for x in range(M)]

def fibo(dan):
    tmp = [1, 1]
    for i in range(2, dan+1):
        tmp.append(tmp[i-1] + tmp[i-2])
    return tmp[dan]

routes = 1
prev = 0
for x in a:
    if x == prev:
        routes = 0
        break
    else:
        dan = (x-1) - prev
        routes = (routes * fibo(dan))
        prev = x+1

routes = (routes * fibo(N-prev)) % 1000000007
print(int(routes))

Buggy python submission (verdict: Runtime Error):
# -*- coding: utf-8 -*-
import sys

N, M = map(int, input().split())
a = [int(input()) for x in range(M)]

def calc_routes(dan):
    tmp = 1
    for i in range(int(dan/2)):
        i += 1
        n = dan - i
        tmp2 = 1
        for j in range(i):
            tmp2 *= n - j
        for j in range(i):
            tmp2 /= j + 1
        tmp += tmp2

    return tmp


for i in range(len(a)-1):
    if a[i+1] - a[i] == 1:
        print(0)
        sys.exit()

routes = 1
prev = 0
for x in a:
    x -= 1
    dan = x - prev
    routes *= calc_routes(dan)
    routes %= 1000000007
    prev = x+2

routes *= calc_routes(N-prev)
routes %= 1000000007
print(int(routes))

Fixed submission:
# -*- coding: utf-8 -*-
from math import factorial

N, M = map(int, input().split())
a = [int(input()) for x in range(M)]

def fibo(dan):
    tmp = [1, 1]
    for i in range(2, dan+1):
        tmp.append(tmp[i-1] + tmp[i-2])
    return tmp[dan]

routes = 1
prev = 0
for x in a:
    if x == prev:
        routes = 0
        break
    else:
        dan = (x-1) - prev
        routes = (routes * fibo(dan))
        prev = x+1

routes = (routes * fibo(N-prev)) % 1000000007
print(int(routes))