Buggy python submission (verdict: Runtime Error):
N, M = map(int, input().split(' '))

def fib(n):
    a, b = 0, 1
    for i in range(0, n):
        a, b = b, a + b
    return a

a_p = int(input())
sum = fib(a_p%1000000007)
sum %= 1000000007
for i in range(M-1):
    a = int(input())
    diff = a - a_p
    if diff == 1:
        print('0')
        exit()
    sum *= fib((diff-1)%1000000007)
    sum %= 1000000007
    a_p = a

if (N - a_p == 1):
    print('0')
    exit()

sum *= fib(N - a_p)
sum %= 1000000007
print(sum)


Fixed submission:
N, M = map(int, input().split(' '))

MOD = 1000000007

def fib(n):
    a, b = 0, 1
    for i in range(0, n):
        a, b = b, a + b
    return a

broken_step = []
p_a = -1
for i in range(M):
    a = int(input())
    if (a - p_a == 1):
        print("0")
        exit()
    else:
        p_a = a
    broken_step.append(a-1)

count_0 = 0
count_1 = 1
next_broken = 0
pre_is_broken = False
for i in range(N):
    if (next_broken >= len(broken_step) or i != broken_step[next_broken]):
        if (pre_is_broken):
            count_0 = 0
            pre_is_broken = False
        else:
            count_0, count_1 = count_1, count_0 + count_1
            count_0 %= MOD
            count_1 %= MOD
    else:
        next_broken+=1
        count_0 = 0
        pre_is_broken = True

print(count_1)

Buggy python submission (verdict: Runtime Error):
from functools import lru_cache
N, M = map(int, input().split(' '))

@lru_cache(maxsize=None)
def fib(n):
    a, b = 0, 1
    for i in range(0, n):
        a, b = b, a + b
    return a

a_p = int(input())
sum = fib(a_p%1000000007)
sum %= 1000000007
for i in range(M-1):
    a = int(input())
    diff = a - a_p
    if diff == 1:
        print('0')
        exit()
    sum *= fib((diff-1)%1000000007)
    sum %= 1000000007
    a_p = a

if (N - a_p == 1):
    print('0')
    exit()

sum *= fib(N - a_p)
sum %= 1000000007
print(sum)


Fixed submission:
N, M = map(int, input().split(' '))

MOD = 1000000007

def fib(n):
    a, b = 0, 1
    for i in range(0, n):
        a, b = b, a + b
    return a

broken_step = []
p_a = -1
for i in range(M):
    a = int(input())
    if (a - p_a == 1):
        print("0")
        exit()
    else:
        p_a = a
    broken_step.append(a-1)

count_0 = 0
count_1 = 1
next_broken = 0
pre_is_broken = False
for i in range(N):
    if (next_broken >= len(broken_step) or i != broken_step[next_broken]):
        if (pre_is_broken):
            count_0 = 0
            pre_is_broken = False
        else:
            count_0, count_1 = count_1, count_0 + count_1
            count_0 %= MOD
            count_1 %= MOD
    else:
        next_broken+=1
        count_0 = 0
        pre_is_broken = True

print(count_1)

Buggy python submission (verdict: Runtime Error):
from functools import lru_cache
N, M = map(int, input().split(' '))

@lru_cache(maxsize=None)
def fib(n):
    a, b = 0, 1
    for i in range(0, n):
        a, b = b, a + b
    return a

a_p = int(input())
sum = fib(a_p%1000000007)
sum %= 1000000007
for i in range(M-1):
    a = int(input())
    diff = a - a_p
    if diff == 1:
        print('0')
        exit()
    sum *= fib((diff-1)%1000000007)
    sum %= 1000000007
    a_p = a

if (N - a_p == 1):
    print('0')
    exit()

sum *= fib(N - a_p)
sum %= 1000000007
print(sum)


Fixed submission:
N, M = map(int, input().split(' '))

MOD = 1000000007

def fib(n):
    a, b = 0, 1
    for i in range(0, n):
        a, b = b, a + b
    return a

broken_step = []
p_a = -1
for i in range(M):
    a = int(input())
    if (a - p_a == 1):
        print("0")
        exit()
    else:
        p_a = a
    broken_step.append(a-1)

count_0 = 0
count_1 = 1
next_broken = 0
pre_is_broken = False
for i in range(N):
    if (next_broken >= len(broken_step) or i != broken_step[next_broken]):
        if (pre_is_broken):
            count_0 = 0
            pre_is_broken = False
        else:
            count_0, count_1 = count_1, count_0 + count_1
            count_0 %= MOD
            count_1 %= MOD
    else:
        next_broken+=1
        count_0 = 0
        pre_is_broken = True

print(count_1)

Buggy python submission (verdict: Runtime Error):
from functools import lru_cache
N, M = map(int, input().split(' '))

@lru_cache(maxsize=None)
def fib(n):
    a, b = 0, 1
    for i in range(0, n):
        a, b = b, a + b
    return a

a_p = int(input())
sum = fib(a_p)
sum %= 1000000007
for i in range(M-1):
    a = int(input())
    diff = a - a_p
    if diff == 1:
        print('0')
        exit()
    sum *= fib((diff-1)%1000000007)
    sum %= 1000000007
    a_p = a

if (N - a_p == 1):
    print('0')
    exit()

sum *= fib(N - a_p)
sum %= 1000000007
print(sum)


Fixed submission:
N, M = map(int, input().split(' '))

MOD = 1000000007

def fib(n):
    a, b = 0, 1
    for i in range(0, n):
        a, b = b, a + b
    return a

broken_step = []
p_a = -1
for i in range(M):
    a = int(input())
    if (a - p_a == 1):
        print("0")
        exit()
    else:
        p_a = a
    broken_step.append(a-1)

count_0 = 0
count_1 = 1
next_broken = 0
pre_is_broken = False
for i in range(N):
    if (next_broken >= len(broken_step) or i != broken_step[next_broken]):
        if (pre_is_broken):
            count_0 = 0
            pre_is_broken = False
        else:
            count_0, count_1 = count_1, count_0 + count_1
            count_0 %= MOD
            count_1 %= MOD
    else:
        next_broken+=1
        count_0 = 0
        pre_is_broken = True

print(count_1)

Buggy python submission (verdict: Runtime Error):
from functools import lru_cache
N, M = map(int, input().split(' '))

@lru_cache(maxsize=None)
def fib(n):
    a, b = 0, 1
    for i in range(0, n):
        a, b = b, a + b
    return a

a_p = int(input())
sum = fib(a_p)
for i in range(M-1):
    a = int(input())
    diff = a - a_p
    if diff == 1:
        print('0')
        exit()
    sum *= fib((diff-1)%1000000007)
    sum %= 1000000007
    a_p = a

if (N - a_p == 1):
    print('0')
    exit()

sum *= fib(N - a_p)
sum %= 1000000007
print(sum)


Fixed submission:
N, M = map(int, input().split(' '))

MOD = 1000000007

def fib(n):
    a, b = 0, 1
    for i in range(0, n):
        a, b = b, a + b
    return a

broken_step = []
p_a = -1
for i in range(M):
    a = int(input())
    if (a - p_a == 1):
        print("0")
        exit()
    else:
        p_a = a
    broken_step.append(a-1)

count_0 = 0
count_1 = 1
next_broken = 0
pre_is_broken = False
for i in range(N):
    if (next_broken >= len(broken_step) or i != broken_step[next_broken]):
        if (pre_is_broken):
            count_0 = 0
            pre_is_broken = False
        else:
            count_0, count_1 = count_1, count_0 + count_1
            count_0 %= MOD
            count_1 %= MOD
    else:
        next_broken+=1
        count_0 = 0
        pre_is_broken = True

print(count_1)

Buggy python submission (verdict: Runtime Error):
N, M = map(int, input().split(' '))

def fib(n):
    a, b = 0, 1
    for i in range(0, n):
        a, b = b, a + b
    return a

a_p = int(input())
sum = fib(a_p)
for i in range(M-1):
    a = int(input())
    diff = a - a_p
    if diff == 1:
        print('0')
        exit()
    sum *= fib((diff-1)%1000000007)
    sum %= 1000000007
    a_p = a

if (N - a_p == 1):
    print('0')
    exit()

sum *= fib(N - a_p)
sum %= 1000000007
print(sum)


Fixed submission:
N, M = map(int, input().split(' '))

MOD = 1000000007

def fib(n):
    a, b = 0, 1
    for i in range(0, n):
        a, b = b, a + b
    return a

broken_step = []
p_a = -1
for i in range(M):
    a = int(input())
    if (a - p_a == 1):
        print("0")
        exit()
    else:
        p_a = a
    broken_step.append(a-1)

count_0 = 0
count_1 = 1
next_broken = 0
pre_is_broken = False
for i in range(N):
    if (next_broken >= len(broken_step) or i != broken_step[next_broken]):
        if (pre_is_broken):
            count_0 = 0
            pre_is_broken = False
        else:
            count_0, count_1 = count_1, count_0 + count_1
            count_0 %= MOD
            count_1 %= MOD
    else:
        next_broken+=1
        count_0 = 0
        pre_is_broken = True

print(count_1)

Buggy python submission (verdict: Runtime Error):
N, M = map(int, input().split(' '))

def fib(n):
    a, b = 0, 1
    for i in range(0, n):
        a, b = b, a + b
    return a

a_p = int(input())
sum = fib(a_p)
for i in range(M-1):
    a = int(input())
    diff = a - a_p
    if diff == 1:
        print('0')
        exit()
    sum *= fib(diff-1)
    sum %= 1000000007
    a_p = a

if (N - a_p == 1):
    print('0')
    exit()

sum *= fib(N - a_p)
sum %= 1000000007
print(sum)


Fixed submission:
N, M = map(int, input().split(' '))

MOD = 1000000007

def fib(n):
    a, b = 0, 1
    for i in range(0, n):
        a, b = b, a + b
    return a

broken_step = []
p_a = -1
for i in range(M):
    a = int(input())
    if (a - p_a == 1):
        print("0")
        exit()
    else:
        p_a = a
    broken_step.append(a-1)

count_0 = 0
count_1 = 1
next_broken = 0
pre_is_broken = False
for i in range(N):
    if (next_broken >= len(broken_step) or i != broken_step[next_broken]):
        if (pre_is_broken):
            count_0 = 0
            pre_is_broken = False
        else:
            count_0, count_1 = count_1, count_0 + count_1
            count_0 %= MOD
            count_1 %= MOD
    else:
        next_broken+=1
        count_0 = 0
        pre_is_broken = True

print(count_1)

Buggy python submission (verdict: Runtime Error):
N, M = map(int, input().split(' '))

def fib(n):
    a, b = 0, 1
    for i in range(0, n):
        a, b = b, a + b
    return a

a_p = int(input())
sum = fib(a_p)
for i in range(M-1):
    a = int(input())
    diff = a - a_p
    if diff == 1:
        print('0')
        exit()
    sum *= fib(diff-1)
    sum %= 1000000007
    a_p = a

if (N - a_p == 1):
    print('0')
    exit()

sum *= fib(N - a_p)

print(sum % 1000000007)


Fixed submission:
N, M = map(int, input().split(' '))

MOD = 1000000007

def fib(n):
    a, b = 0, 1
    for i in range(0, n):
        a, b = b, a + b
    return a

broken_step = []
p_a = -1
for i in range(M):
    a = int(input())
    if (a - p_a == 1):
        print("0")
        exit()
    else:
        p_a = a
    broken_step.append(a-1)

count_0 = 0
count_1 = 1
next_broken = 0
pre_is_broken = False
for i in range(N):
    if (next_broken >= len(broken_step) or i != broken_step[next_broken]):
        if (pre_is_broken):
            count_0 = 0
            pre_is_broken = False
        else:
            count_0, count_1 = count_1, count_0 + count_1
            count_0 %= MOD
            count_1 %= MOD
    else:
        next_broken+=1
        count_0 = 0
        pre_is_broken = True

print(count_1)

Buggy python submission (verdict: Runtime Error):
N, M = map(int, input().split(' '))

def fib(n):
    a, b = 0, 1
    for i in range(0, n):
        a, b = b, a + b
    return a

a_p = int(input())
sum = fib(a_p)
for i in range(M-1):
    a = int(input())
    diff = a - a_p
    if diff == 1:
        print('0')
        exit()
    sum *= fib(diff-1)
    sum %= 1000000007
    a_p = a

if (N - a_p == 1):
    print('0')
    exit()

sum *= fib(N - a_p)

print(sum % 1000000007)


Fixed submission:
N, M = map(int, input().split(' '))

MOD = 1000000007

def fib(n):
    a, b = 0, 1
    for i in range(0, n):
        a, b = b, a + b
    return a

broken_step = []
p_a = -1
for i in range(M):
    a = int(input())
    if (a - p_a == 1):
        print("0")
        exit()
    else:
        p_a = a
    broken_step.append(a-1)

count_0 = 0
count_1 = 1
next_broken = 0
pre_is_broken = False
for i in range(N):
    if (next_broken >= len(broken_step) or i != broken_step[next_broken]):
        if (pre_is_broken):
            count_0 = 0
            pre_is_broken = False
        else:
            count_0, count_1 = count_1, count_0 + count_1
            count_0 %= MOD
            count_1 %= MOD
    else:
        next_broken+=1
        count_0 = 0
        pre_is_broken = True

print(count_1)

Buggy python submission (verdict: Runtime Error):
N, M = map(int, input().split(' '))

def fib(n):
    a, b = 0, 1
    for i in range(0, n):
        a, b = b, a + b
    return a

a_p = int(input())
sum = fib(a_p)
for i in range(M-1):
    a = int(input())
    diff = a - a_p
    if diff == 1:
        print('0')
        exit()
    sum *= fib(diff-1)
    sum %= 1000000007
    a_p = a

if (N - a_p == 1):
    print('0')
    exit()

sum *= fib(N - a_p)

print(sum % 1000000007)


Fixed submission:
N, M = map(int, input().split(' '))

MOD = 1000000007

def fib(n):
    a, b = 0, 1
    for i in range(0, n):
        a, b = b, a + b
    return a

broken_step = []
p_a = -1
for i in range(M):
    a = int(input())
    if (a - p_a == 1):
        print("0")
        exit()
    else:
        p_a = a
    broken_step.append(a-1)

count_0 = 0
count_1 = 1
next_broken = 0
pre_is_broken = False
for i in range(N):
    if (next_broken >= len(broken_step) or i != broken_step[next_broken]):
        if (pre_is_broken):
            count_0 = 0
            pre_is_broken = False
        else:
            count_0, count_1 = count_1, count_0 + count_1
            count_0 %= MOD
            count_1 %= MOD
    else:
        next_broken+=1
        count_0 = 0
        pre_is_broken = True

print(count_1)

Buggy python submission (verdict: Runtime Error):
N, M = map(int, input().split(' '))

def fib(n):
    a, b = 0, 1
    for i in range(0, n):
        a, b = b, a + b
    return a

a_p = int(input())
sum = fib(a_p)
for i in range(M-1):
    a = int(input())
    diff = a - a_p
    if diff == 1:
        print('0')
        exit()
    sum *= fib(diff-1)
    sum %= 1000000007
    a_p = a

sum *= fib(N - a_p)

print(sum % 1000000007)


Fixed submission:
N, M = map(int, input().split(' '))

MOD = 1000000007

def fib(n):
    a, b = 0, 1
    for i in range(0, n):
        a, b = b, a + b
    return a

broken_step = []
p_a = -1
for i in range(M):
    a = int(input())
    if (a - p_a == 1):
        print("0")
        exit()
    else:
        p_a = a
    broken_step.append(a-1)

count_0 = 0
count_1 = 1
next_broken = 0
pre_is_broken = False
for i in range(N):
    if (next_broken >= len(broken_step) or i != broken_step[next_broken]):
        if (pre_is_broken):
            count_0 = 0
            pre_is_broken = False
        else:
            count_0, count_1 = count_1, count_0 + count_1
            count_0 %= MOD
            count_1 %= MOD
    else:
        next_broken+=1
        count_0 = 0
        pre_is_broken = True

print(count_1)

Buggy python submission (verdict: Runtime Error):
N, M = map(int, input().split(' '))

def fib(n):
    a, b = 0, 1
    for i in range(0, n):
        a, b = b, a + b
    return a

a_p = int(input())
sum = fib(a_p)
for i in range(M-1):
    a = int(input())
    diff = a - a_p
    if diff == 1:
        print('0')
        exit()
    sum *= fib(diff-1)
    a_p = a

sum *= fib(N - a_p)

print(sum % 1000000007)


Fixed submission:
N, M = map(int, input().split(' '))

MOD = 1000000007

def fib(n):
    a, b = 0, 1
    for i in range(0, n):
        a, b = b, a + b
    return a

broken_step = []
p_a = -1
for i in range(M):
    a = int(input())
    if (a - p_a == 1):
        print("0")
        exit()
    else:
        p_a = a
    broken_step.append(a-1)

count_0 = 0
count_1 = 1
next_broken = 0
pre_is_broken = False
for i in range(N):
    if (next_broken >= len(broken_step) or i != broken_step[next_broken]):
        if (pre_is_broken):
            count_0 = 0
            pre_is_broken = False
        else:
            count_0, count_1 = count_1, count_0 + count_1
            count_0 %= MOD
            count_1 %= MOD
    else:
        next_broken+=1
        count_0 = 0
        pre_is_broken = True

print(count_1)

Buggy python submission (verdict: Runtime Error):
N, M = map(int, input().split(' '))

def fib(n):
    a, b = 0, 1
    for i in range(0, n):
        a, b = b, a + b
    return a

a_p = int(input())
sum = fib(a_p)
for i in range(M-1):
    a = int(input())
    diff = a - a_p
    if diff == 1:
        print('0')
        exit()
    sum *= fib(diff-1)
    a_p = a

sum *= fib(N - a_p)

print(sum % 1000000007)


Fixed submission:
N, M = map(int, input().split(' '))

MOD = 1000000007

def fib(n):
    a, b = 0, 1
    for i in range(0, n):
        a, b = b, a + b
    return a

broken_step = []
p_a = -1
for i in range(M):
    a = int(input())
    if (a - p_a == 1):
        print("0")
        exit()
    else:
        p_a = a
    broken_step.append(a-1)

count_0 = 0
count_1 = 1
next_broken = 0
pre_is_broken = False
for i in range(N):
    if (next_broken >= len(broken_step) or i != broken_step[next_broken]):
        if (pre_is_broken):
            count_0 = 0
            pre_is_broken = False
        else:
            count_0, count_1 = count_1, count_0 + count_1
            count_0 %= MOD
            count_1 %= MOD
    else:
        next_broken+=1
        count_0 = 0
        pre_is_broken = True

print(count_1)

Buggy python submission (verdict: Runtime Error):
N, M = map(int, input().split(' '))

def fib(n):
    if n < 2:
        return n
    else:
        return fib(n - 1) + fib(n -2)

a_p = int(input())
sum = fib(a_p)
for i in range(M-1):
    a = int(input())
    diff = a - a_p
    if diff == 1:
        print('0')
        exit()
    sum *= fib(diff-1)
    a_p = a

sum *= fib(N - a_p)

print(sum % 1000000007)


Fixed submission:
N, M = map(int, input().split(' '))

MOD = 1000000007

def fib(n):
    a, b = 0, 1
    for i in range(0, n):
        a, b = b, a + b
    return a

broken_step = []
p_a = -1
for i in range(M):
    a = int(input())
    if (a - p_a == 1):
        print("0")
        exit()
    else:
        p_a = a
    broken_step.append(a-1)

count_0 = 0
count_1 = 1
next_broken = 0
pre_is_broken = False
for i in range(N):
    if (next_broken >= len(broken_step) or i != broken_step[next_broken]):
        if (pre_is_broken):
            count_0 = 0
            pre_is_broken = False
        else:
            count_0, count_1 = count_1, count_0 + count_1
            count_0 %= MOD
            count_1 %= MOD
    else:
        next_broken+=1
        count_0 = 0
        pre_is_broken = True

print(count_1)

Buggy python submission (verdict: Runtime Error):
N, M = map(int, input().split(' '))

def fib(n):
    if n < 2:
        return n
    else:
        return fib(n - 1) + fib(n -2)

safe_area = []
a_p = int(input())
safe_area.append(a_p)
for i in range(M-1):
    a = int(input())
    diff = a - a_p
    if diff == 1:
        print('0')
        exit()
    safe_area.append(diff-1)
    a_p = a

safe_area.append(N - a_p)

sum = 1
for i in safe_area:
    sum *= fib(i)
print(sum % 1000000007)


Fixed submission:
N, M = map(int, input().split(' '))

MOD = 1000000007

def fib(n):
    a, b = 0, 1
    for i in range(0, n):
        a, b = b, a + b
    return a

broken_step = []
p_a = -1
for i in range(M):
    a = int(input())
    if (a - p_a == 1):
        print("0")
        exit()
    else:
        p_a = a
    broken_step.append(a-1)

count_0 = 0
count_1 = 1
next_broken = 0
pre_is_broken = False
for i in range(N):
    if (next_broken >= len(broken_step) or i != broken_step[next_broken]):
        if (pre_is_broken):
            count_0 = 0
            pre_is_broken = False
        else:
            count_0, count_1 = count_1, count_0 + count_1
            count_0 %= MOD
            count_1 %= MOD
    else:
        next_broken+=1
        count_0 = 0
        pre_is_broken = True

print(count_1)

Buggy python submission (verdict: Runtime Error):
from functools import lru_cache

N, M = map(int, input().split(' '))

@lru_cache(maxsize=4096)
def fib(n):
    if n < 2:
        return n
    else:
        return fib(n - 1) + fib(n -2)

safe_area = []
a_p = int(input())
sum = fib(a_p)
for i in range(M-1):
    a = int(input())
    diff = a - a_p
    if diff == 1:
        print('0')
        exit()
    sum *= fib(diff-1)
    a_p = a

sum *= fib(N - a_p)

print(sum % 1000000007)


Fixed submission:
N, M = map(int, input().split(' '))

MOD = 1000000007

def fib(n):
    a, b = 0, 1
    for i in range(0, n):
        a, b = b, a + b
    return a

broken_step = []
p_a = -1
for i in range(M):
    a = int(input())
    if (a - p_a == 1):
        print("0")
        exit()
    else:
        p_a = a
    broken_step.append(a-1)

count_0 = 0
count_1 = 1
next_broken = 0
pre_is_broken = False
for i in range(N):
    if (next_broken >= len(broken_step) or i != broken_step[next_broken]):
        if (pre_is_broken):
            count_0 = 0
            pre_is_broken = False
        else:
            count_0, count_1 = count_1, count_0 + count_1
            count_0 %= MOD
            count_1 %= MOD
    else:
        next_broken+=1
        count_0 = 0
        pre_is_broken = True

print(count_1)

Buggy python submission (verdict: Runtime Error):
from functools import lru_cache

N, M = map(int, input().split(' '))

@lru_cache(maxsize=4096)
def fib(n):
    if n < 2:
        return n
    else:
        return fib(n - 1) + fib(n -2)

safe_area = []
a_p = int(input())
safe_area.append(a_p)
for i in range(M-1):
    a = int(input())
    diff = a - a_p
    if diff == 1:
        print('0')
        exit()
    safe_area.append(diff-1)
    a_p = a

safe_area.append(N - a_p)

sum = 1
for i in safe_area:
    sum *= fib(i)
print(sum % 1000000007)


Fixed submission:
N, M = map(int, input().split(' '))

MOD = 1000000007

def fib(n):
    a, b = 0, 1
    for i in range(0, n):
        a, b = b, a + b
    return a

broken_step = []
p_a = -1
for i in range(M):
    a = int(input())
    if (a - p_a == 1):
        print("0")
        exit()
    else:
        p_a = a
    broken_step.append(a-1)

count_0 = 0
count_1 = 1
next_broken = 0
pre_is_broken = False
for i in range(N):
    if (next_broken >= len(broken_step) or i != broken_step[next_broken]):
        if (pre_is_broken):
            count_0 = 0
            pre_is_broken = False
        else:
            count_0, count_1 = count_1, count_0 + count_1
            count_0 %= MOD
            count_1 %= MOD
    else:
        next_broken+=1
        count_0 = 0
        pre_is_broken = True

print(count_1)

Buggy python submission (verdict: Runtime Error):
N, M = map(int, input().split(' '))

@lru_cache(maxsize=4096)
def fib(n):
    if n < 2:
        return n
    else:
        return fib(n - 1) + fib(n -2)

safe_area = []
a_p = int(input())
safe_area.append(a_p)
for i in range(M-1):
    a = int(input())
    diff = a - a_p
    if diff == 1:
        print('0')
        exit()
    safe_area.append(diff-1)
    a_p = a

safe_area.append(N - a_p)

sum = 1
for i in safe_area:
    sum *= fib(i)
print(sum % 1000000007)


Fixed submission:
N, M = map(int, input().split(' '))

MOD = 1000000007

def fib(n):
    a, b = 0, 1
    for i in range(0, n):
        a, b = b, a + b
    return a

broken_step = []
p_a = -1
for i in range(M):
    a = int(input())
    if (a - p_a == 1):
        print("0")
        exit()
    else:
        p_a = a
    broken_step.append(a-1)

count_0 = 0
count_1 = 1
next_broken = 0
pre_is_broken = False
for i in range(N):
    if (next_broken >= len(broken_step) or i != broken_step[next_broken]):
        if (pre_is_broken):
            count_0 = 0
            pre_is_broken = False
        else:
            count_0, count_1 = count_1, count_0 + count_1
            count_0 %= MOD
            count_1 %= MOD
    else:
        next_broken+=1
        count_0 = 0
        pre_is_broken = True

print(count_1)

Buggy python submission (verdict: Runtime Error):
N, M = map(int, input().split(' '))

def fib(n):
    if n < 2:
        return n
    else:
        return fib(n - 1) + fib(n -2)

safe_area = []
a_p = int(input())
safe_area.append(a_p)
for i in range(M-1):
    a = int(input())
    diff = a - a_p
    if diff == 1:
        print('0')
        exit()
    safe_area.append(diff-1)
    a_p = a

safe_area.append(N - a_p)

sum = 1
for i in safe_area:
    sum *= fib(i)
print(sum % 1000000007)


Fixed submission:
N, M = map(int, input().split(' '))

MOD = 1000000007

def fib(n):
    a, b = 0, 1
    for i in range(0, n):
        a, b = b, a + b
    return a

broken_step = []
p_a = -1
for i in range(M):
    a = int(input())
    if (a - p_a == 1):
        print("0")
        exit()
    else:
        p_a = a
    broken_step.append(a-1)

count_0 = 0
count_1 = 1
next_broken = 0
pre_is_broken = False
for i in range(N):
    if (next_broken >= len(broken_step) or i != broken_step[next_broken]):
        if (pre_is_broken):
            count_0 = 0
            pre_is_broken = False
        else:
            count_0, count_1 = count_1, count_0 + count_1
            count_0 %= MOD
            count_1 %= MOD
    else:
        next_broken+=1
        count_0 = 0
        pre_is_broken = True

print(count_1)