Buggy python submission (verdict: Time Limit Exceeded):
n,m = map(int,input().split(" "))
a=[-100] * m
ans = 1
for i in range(m):
    a[i] = int(input())
    if a[i]-1 == a[i-1]:
        ans = 0

if ans == 1:
    for j in range(n,-1,-1):
        if j in a:
            ans *= 1
        elif j+1 in a or j+2 in a:
            ans *= 1
        elif j+2 > n:
            ans *= 1
        elif not(j+3 in a) and not(j+3 > n):
            temp = ans
            ans += t
            t = temp
        else:
            t = ans
            ans *= 2

print(ans % 1000000007)


Fixed submission:
n,m = map(int,input().split(" "))
a=[0] * (n+1)
mod = 10 ** 9 + 7
for i in range(m):
    a[int(input())] = 1

dp = [0] * (n+1)
for j in range(n+1):
    if a[j] == 1:
        dp[j] = 0
    elif j == 1 or j == 0:
        dp[j] = 1
    else:
        dp[j] = (dp[j-1] + dp[j-2]) % mod

print(dp[n])

Buggy python submission (verdict: Time Limit Exceeded):
n,m = map(int,input().split(" "))
a=[]
mod = 10 ** 9 + 7
for i in range(m):
    a.append(int(input()))

dp = [0] * (n+1)
for j in range(n+1):
    if j in a:
        dp[j] = 0
    elif j == 1 or j == 0:
        dp[j] = 1
    else:
        dp[j] = (dp[j-1] + dp[j-2]) % mod

print(dp[n])


Fixed submission:
n,m = map(int,input().split(" "))
a=[0] * (n+1)
mod = 10 ** 9 + 7
for i in range(m):
    a[int(input())] = 1

dp = [0] * (n+1)
for j in range(n+1):
    if a[j] == 1:
        dp[j] = 0
    elif j == 1 or j == 0:
        dp[j] = 1
    else:
        dp[j] = (dp[j-1] + dp[j-2]) % mod

print(dp[n])

Buggy python submission (verdict: Time Limit Exceeded):
n,m = map(int,input().split(" "))
a=[]
mod = 10 ** 9 + 7
for i in range(m):
    a.append(int(input()))

dp = [0] * (n+1)
for j in range(n+1):
    if j in a:
        dp[j] = 0
    elif j > 1:
        dp[j] = (dp[j-1] + dp[j-2]) % mod
    else:
        dp[j] = 1

print(dp[n])


Fixed submission:
n,m = map(int,input().split(" "))
a=[0] * (n+1)
mod = 10 ** 9 + 7
for i in range(m):
    a[int(input())] = 1

dp = [0] * (n+1)
for j in range(n+1):
    if a[j] == 1:
        dp[j] = 0
    elif j == 1 or j == 0:
        dp[j] = 1
    else:
        dp[j] = (dp[j-1] + dp[j-2]) % mod

print(dp[n])

Buggy python submission (verdict: Time Limit Exceeded):
n,m = map(int,input().split(" "))
a=[]
mod = 10 ** 9 + 7
ans = 1
for i in range(m):
    a.append(int(input()))
    if a[i]-1 == a[i-1]:
        ans = 0

dp = [1] * (n+1)
for j in range(n+1):
    if j in a:
        dp[j] = 0
    elif j > 1:
        dp[j] = dp[j-1] + dp[j-2]

print(dp[n]%mod)


Fixed submission:
n,m = map(int,input().split(" "))
a=[0] * (n+1)
mod = 10 ** 9 + 7
for i in range(m):
    a[int(input())] = 1

dp = [0] * (n+1)
for j in range(n+1):
    if a[j] == 1:
        dp[j] = 0
    elif j == 1 or j == 0:
        dp[j] = 1
    else:
        dp[j] = (dp[j-1] + dp[j-2]) % mod

print(dp[n])

Buggy python submission (verdict: Time Limit Exceeded):
n,m = map(int,input().split(" "))
a=[]
ans = 1
for i in range(m):
    a.append(int(input()))
    if a[i]-1 == a[i-1]:
        ans = 0
if ans == 1:
    for j in range(n,-1,-1):
        if j in a:
            ans *= 1
        elif j+1 in a or j+2 in a:
            ans *= 1
        elif j+2 > n:
            ans *= 1
        elif not(j+3 in a) and not(j+3 > n):
            temp = ans
            ans += t
            t = temp
        else:
            t = ans
            ans *= 2

print(ans % 1000000007)


Fixed submission:
n,m = map(int,input().split(" "))
a=[0] * (n+1)
mod = 10 ** 9 + 7
for i in range(m):
    a[int(input())] = 1

dp = [0] * (n+1)
for j in range(n+1):
    if a[j] == 1:
        dp[j] = 0
    elif j == 1 or j == 0:
        dp[j] = 1
    else:
        dp[j] = (dp[j-1] + dp[j-2]) % mod

print(dp[n])

Buggy python submission (verdict: Time Limit Exceeded):
n,m = map(int,input().split(" "))
a=[]
mod = 10 ** 9 + 7
ans = 1
for i in range(m):
    a.append(int(input()))
    if a[i]-1 == a[i-1]:
        ans = 0
if ans == 1:
    for j in range(n,-1,-1):
        if j in a:
            ans *= 1
        elif j+1 in a or j+2 in a:
            ans *= 1
        elif j+2 > n:
            ans *= 1
        elif not(j+3 in a) and not(j+3 > n):
            temp = ans
            ans += t
            t = temp
        else:
            t = ans
            ans *= 2

print(ans % mod)


Fixed submission:
n,m = map(int,input().split(" "))
a=[0] * (n+1)
mod = 10 ** 9 + 7
for i in range(m):
    a[int(input())] = 1

dp = [0] * (n+1)
for j in range(n+1):
    if a[j] == 1:
        dp[j] = 0
    elif j == 1 or j == 0:
        dp[j] = 1
    else:
        dp[j] = (dp[j-1] + dp[j-2]) % mod

print(dp[n])

Buggy python submission (verdict: Runtime Error):
n,m = map(int,input().split(" "))
a=[]
ans = 1
for i in range(m):
    a.append(int(input()))
    if a[i]-1 == a[i-1]:
        ans = 0
if ans == 1:
    t,w,v = 0,0,0
    for j in range(len(a)):
        if j+1 == m:
            if n-a[j] >= 3:
                v += 1
                w += n-a[j]
            break
        elif a[j] - t >= 3:
            v += 1
            w += a[j] - t
            t = a[j] + 1
        else:
            t = a[j] + 1
ans = v * 2
t = ans // 2
for k in range(w):
    temp = ans
    ans += t
    t = temp

print(ans % 1000000007)


Fixed submission:
n,m = map(int,input().split(" "))
a=[0] * (n+1)
mod = 10 ** 9 + 7
for i in range(m):
    a[int(input())] = 1

dp = [0] * (n+1)
for j in range(n+1):
    if a[j] == 1:
        dp[j] = 0
    elif j == 1 or j == 0:
        dp[j] = 1
    else:
        dp[j] = (dp[j-1] + dp[j-2]) % mod

print(dp[n])

Buggy python submission (verdict: Time Limit Exceeded):
n,m = map(int,input().split(" "))
a=[]
ans = 1
for i in range(m):
    a.append(int(input()))
    if a[i]-1 == a[i-1]:
        ans = 0
if ans == 1:
    for j in range(n,-1,-1):
        if j in a:
            ans *= 1
        elif j+1 in a or j+2 in a:
            ans *= 1
        elif j+2 > n:
            ans *= 1
        elif not(j+3 in a) and not(j+3 > n):
            temp = ans
            ans += t
            t = temp
        else:
            t = ans
            ans *= 2

print(ans % 1000000007)


Fixed submission:
n,m = map(int,input().split(" "))
a=[0] * (n+1)
mod = 10 ** 9 + 7
for i in range(m):
    a[int(input())] = 1

dp = [0] * (n+1)
for j in range(n+1):
    if a[j] == 1:
        dp[j] = 0
    elif j == 1 or j == 0:
        dp[j] = 1
    else:
        dp[j] = (dp[j-1] + dp[j-2]) % mod

print(dp[n])

Buggy python submission (verdict: Time Limit Exceeded):
n,m = map(int,input().split(" "))
a=[]
ans = 1
for i in range(m):
    a.append(int(input()))
    if a[i]-1 == a[i-1]:
        ans = 0
if ans == 1:
    t = 1
    for j in range(n,-1,-1):
        if j in a:
            ans *= 1
        elif j+1 in a or j+2 in a:
            ans *= 1
        elif j+2 > n:
            ans *= 1
        elif not(j+2 in a) and not(j+3 in a) and not(j+3 > n):
            t2 = ans
            ans += t
            t = t2
        else:
            t = ans
            ans *= 2

print(ans % 1000000007)


Fixed submission:
n,m = map(int,input().split(" "))
a=[0] * (n+1)
mod = 10 ** 9 + 7
for i in range(m):
    a[int(input())] = 1

dp = [0] * (n+1)
for j in range(n+1):
    if a[j] == 1:
        dp[j] = 0
    elif j == 1 or j == 0:
        dp[j] = 1
    else:
        dp[j] = (dp[j-1] + dp[j-2]) % mod

print(dp[n])