Buggy python submission (verdict: Runtime Error):
F = [1,1]

def fibo(n):
    if n <= len(F):
        return F[n-1]
    while len(F) < n:
        F.append(F[-1] + F[-2])
    return F[n-1]

N, M = list(map(int, input().split()))
A = [int(input()) for _ in range(M)]
MOD = 1000000007

B = [A[0]]
for i in range(M-1):
    B.append(A[i+1] - A[i] - 1)
B.append(N - A[M-1])
ans = 1
if 0 in B:
    ans = 0
else:
    for n in B:
        ans *= fibo(n)
print(ans % MOD)


Fixed submission:
"""
F = [1,1]
def fibo(n):
    if n <= len(F):
        return F[n-1]
    while len(F) < n:
        F.append(F[-1] + F[-2])
    return F[n-1]
"""

N, M = list(map(int, input().split()))
A = [int(input()) for _ in range(M)]
MOD = 1000000007

if M == 0:
    B = []
    B.append(N+1)
elif M == 1:
    B = []
    B.append(A[0])
    B.append(N - A[0])

else:
    B = [A[0]]
    for i in range(M-1):
        B.append(A[i+1] - A[i] - 1)
    B.append(N - A[M-1])


ans = 1
if 0 in B:
    ans = 0
else:
    F = [1,1]
    for n in B:
        while len(F) < n:
            F.append(F[-1] + F[-2])
        now = F[n-1]
        ans = ans * now % MOD
print(ans)

Buggy python submission (verdict: Runtime Error):

N, M = list(map(int, input().split()))
A = [int(input()) for _ in range(M)]
MOD = 1000000007

if M >= 1:
    B = [A[0]]
    for i in range(M-1):
        B.append(A[i+1] - A[i] - 1)
    B.append(N - A[M-1])
else:
    B.append(N-1)

ans = 1
if 0 in B:
    ans = 0
else:
    F = [1,1]
    for n in B:
        while len(F) < n:
            F.append(F[-1] + F[-2])
        now = F[n-1]
        ans = ans * now % MOD
print(ans)


Fixed submission:
"""
F = [1,1]
def fibo(n):
    if n <= len(F):
        return F[n-1]
    while len(F) < n:
        F.append(F[-1] + F[-2])
    return F[n-1]
"""

N, M = list(map(int, input().split()))
A = [int(input()) for _ in range(M)]
MOD = 1000000007

if M == 0:
    B = []
    B.append(N+1)
elif M == 1:
    B = []
    B.append(A[0])
    B.append(N - A[0])

else:
    B = [A[0]]
    for i in range(M-1):
        B.append(A[i+1] - A[i] - 1)
    B.append(N - A[M-1])


ans = 1
if 0 in B:
    ans = 0
else:
    F = [1,1]
    for n in B:
        while len(F) < n:
            F.append(F[-1] + F[-2])
        now = F[n-1]
        ans = ans * now % MOD
print(ans)

Buggy python submission (verdict: Runtime Error):
"""
F = [1,1]
def fibo(n):
    if n <= len(F):
        return F[n-1]
    while len(F) < n:
        F.append(F[-1] + F[-2])
    return F[n-1]
"""

N, M = list(map(int, input().split()))
A = [int(input()) for _ in range(M)]
MOD = 1000000007

B = [A[0]]
for i in range(M-1):
    B.append(A[i+1] - A[i] - 1)
B.append(N - A[M-1])
ans = 1
if 0 in B:
    ans = 0
else:
    F = [1,1]
    for n in B:
        while len(F) < n:
            F.append(F[-1] + F[-2])
        now = F[n-1]
        ans = ans * now % MOD
print(ans)


Fixed submission:
"""
F = [1,1]
def fibo(n):
    if n <= len(F):
        return F[n-1]
    while len(F) < n:
        F.append(F[-1] + F[-2])
    return F[n-1]
"""

N, M = list(map(int, input().split()))
A = [int(input()) for _ in range(M)]
MOD = 1000000007

if M == 0:
    B = []
    B.append(N+1)
elif M == 1:
    B = []
    B.append(A[0])
    B.append(N - A[0])

else:
    B = [A[0]]
    for i in range(M-1):
        B.append(A[i+1] - A[i] - 1)
    B.append(N - A[M-1])


ans = 1
if 0 in B:
    ans = 0
else:
    F = [1,1]
    for n in B:
        while len(F) < n:
            F.append(F[-1] + F[-2])
        now = F[n-1]
        ans = ans * now % MOD
print(ans)

Buggy python submission (verdict: Runtime Error):
F = [1,1]

def fibo(n):
    if n <= len(F):
        return F[n-1]
    while len(F) < n:
        F.append(F[-1] + F[-2])
    return F[n-1]

N, M = list(map(int, input().split()))
A = [int(input()) for _ in range(M)]
MOD = 1000000007

B = [A[0]]
for i in range(M-1):
    B.append(A[i+1] - A[i] - 1)
B.append(N - A[M-1])
ans = 1
if 0 in B:
    ans = 0
else:
    F = [1,1]
    for n in B:
        while len(F) < n:
            F.append(F[-1] + F[-2])
        now = F[n-1]
        ans = ans * now % MOD
print(ans)


Fixed submission:
"""
F = [1,1]
def fibo(n):
    if n <= len(F):
        return F[n-1]
    while len(F) < n:
        F.append(F[-1] + F[-2])
    return F[n-1]
"""

N, M = list(map(int, input().split()))
A = [int(input()) for _ in range(M)]
MOD = 1000000007

if M == 0:
    B = []
    B.append(N+1)
elif M == 1:
    B = []
    B.append(A[0])
    B.append(N - A[0])

else:
    B = [A[0]]
    for i in range(M-1):
        B.append(A[i+1] - A[i] - 1)
    B.append(N - A[M-1])


ans = 1
if 0 in B:
    ans = 0
else:
    F = [1,1]
    for n in B:
        while len(F) < n:
            F.append(F[-1] + F[-2])
        now = F[n-1]
        ans = ans * now % MOD
print(ans)

Buggy python submission (verdict: Runtime Error):
F = [1,1]

def fibo(n):
    if n <= len(F):
        return F[n-1]
    while len(F) < n:
        F.append(F[-1] + F[-2])
    return F[n-1]

N, M = list(map(int, input().split()))
A = [int(input()) for _ in range(M)]
MOD = 1000000007

B = [A[0]]
for i in range(M-1):
    B.append(A[i+1] - A[i] - 1)
B.append(N - A[M-1])
ans = 1
if 0 in B:
    ans = 0
else:
    F = [1,1]
    for n in B:
        while len(F) < n:
            F.append(F[-1] + F[-2])
        now = F[n-1]
        ans = ans * now % MOD
print(ans)


Fixed submission:
"""
F = [1,1]
def fibo(n):
    if n <= len(F):
        return F[n-1]
    while len(F) < n:
        F.append(F[-1] + F[-2])
    return F[n-1]
"""

N, M = list(map(int, input().split()))
A = [int(input()) for _ in range(M)]
MOD = 1000000007

if M == 0:
    B = []
    B.append(N+1)
elif M == 1:
    B = []
    B.append(A[0])
    B.append(N - A[0])

else:
    B = [A[0]]
    for i in range(M-1):
        B.append(A[i+1] - A[i] - 1)
    B.append(N - A[M-1])


ans = 1
if 0 in B:
    ans = 0
else:
    F = [1,1]
    for n in B:
        while len(F) < n:
            F.append(F[-1] + F[-2])
        now = F[n-1]
        ans = ans * now % MOD
print(ans)

Buggy python submission (verdict: Runtime Error):
F = [1,1]

def fibo(n):
    if n <= len(F):
        return F[n-1]
    while len(F) < n:
        F.append(F[-1] + F[-2])
    return F[n-1]

N, M = list(map(int, input().split()))
A = [int(input()) for _ in range(M)]
MOD = 1000000007

B = [A[0]]
for i in range(M-1):
    B.append(A[i+1] - A[i] - 1)
B.append(N - A[M-1])
ans = 1
if 0 in B:
    ans = 0
else:
    for n in B:
        ans = ans * fibo(n) % MOD
print(ans)


Fixed submission:
"""
F = [1,1]
def fibo(n):
    if n <= len(F):
        return F[n-1]
    while len(F) < n:
        F.append(F[-1] + F[-2])
    return F[n-1]
"""

N, M = list(map(int, input().split()))
A = [int(input()) for _ in range(M)]
MOD = 1000000007

if M == 0:
    B = []
    B.append(N+1)
elif M == 1:
    B = []
    B.append(A[0])
    B.append(N - A[0])

else:
    B = [A[0]]
    for i in range(M-1):
        B.append(A[i+1] - A[i] - 1)
    B.append(N - A[M-1])


ans = 1
if 0 in B:
    ans = 0
else:
    F = [1,1]
    for n in B:
        while len(F) < n:
            F.append(F[-1] + F[-2])
        now = F[n-1]
        ans = ans * now % MOD
print(ans)

Buggy python submission (verdict: Runtime Error):
F = [1,1]

def fibo(n):
    if n <= len(F):
        return F[n-1]
    while len(F) < n:
        F.append(F[-1] + F[-2])
    return F[n-1]

N, M = list(map(int, input().split()))
A = [int(input()) for _ in range(M)]
MOD = 1000000007

B = [A[0]]
for i in range(M-1):
    B.append(A[i+1] - A[i] - 1)
B.append(N - A[M-1])
ans = 1
if 0 in B:
    ans = 0
else:
    for n in B:
        ans *= fibo(n)
print(ans % MOD)


Fixed submission:
"""
F = [1,1]
def fibo(n):
    if n <= len(F):
        return F[n-1]
    while len(F) < n:
        F.append(F[-1] + F[-2])
    return F[n-1]
"""

N, M = list(map(int, input().split()))
A = [int(input()) for _ in range(M)]
MOD = 1000000007

if M == 0:
    B = []
    B.append(N+1)
elif M == 1:
    B = []
    B.append(A[0])
    B.append(N - A[0])

else:
    B = [A[0]]
    for i in range(M-1):
        B.append(A[i+1] - A[i] - 1)
    B.append(N - A[M-1])


ans = 1
if 0 in B:
    ans = 0
else:
    F = [1,1]
    for n in B:
        while len(F) < n:
            F.append(F[-1] + F[-2])
        now = F[n-1]
        ans = ans * now % MOD
print(ans)