Buggy python submission (verdict: Runtime Error):
N,M = [int(i) for i in input().split()]
A = []
for _ in range(M):
    A.append(int(input()))
def fib_memo(n):
    memo = [0]*(n+1)
    def _fib(n):
        if n <= 2:
            return n
        if memo[n] != 0:
            return memo[n]
        memo[n] = _fib(n-1) + _fib(n-2)
        return memo[n]
    return _fib(n)
cnt = 1
for a in range(len(A)+1):
    if a == 0:
        if A[a] == 1:
            width = 1
        else:
            width = A[a]-1
    elif a > 0 and a < M:
        width = A[a] - A[a-1] - 2
    elif a == (M):
        width = N-A[a-1]-1
    if width < 0:
        tmp = 0
        cnt = 0
        break
    else:
        tmp = fib_memo(width)%1000000007
    cnt = (tmp*cnt)%1000000007
print(cnt)

Fixed submission:
mod = 1000000007
N,M = [int(i) for i in input().split()]
A = []
for _ in range(M):
    A.append(int(input()))
steps = [0]*N
for a in A:
    steps[a-1] = 1
cnt = []
for n in range(N):
    if n == 0:
        if steps[n]==0:
            cnt.append(1)
        elif steps[n]==1:
            cnt.append(0)
    elif n == 1:
        if steps[n]==0:
            cnt.append(cnt[n-1]+1)
        elif steps[n]==1:
            cnt.append(0)
    elif steps[n] == 0:
        cnt.append((cnt[n-2]+cnt[n-1])%mod)
    elif steps[n] == 1:
        cnt.append(0)
print(cnt[-1])

Buggy python submission (verdict: Runtime Error):
N,M = [int(i) for i in input().split()]
A = []
for _ in range(M):
    A.append(int(input()))
def fibo(n):
    if n <= 2:
        return n
    return fibo(n-1) + fibo(n-2)
cnt = 1
for a in range(len(A)+1):
    if a == 0:
        if A[a] == 1:
            width = 1
        else:
            width = A[a]-1
    elif a > 0 and a < M:
        width = A[a] - A[a-1] - 2
    elif a == (M):
        width = N-A[a-1]-1
    if width < 0:
        tmp = 0
        cnt = 0
        break
    else:
        tmp = fibo(width)%1000000007
    cnt = (tmp*cnt)%1000000007
print(cnt)

Fixed submission:
mod = 1000000007
N,M = [int(i) for i in input().split()]
A = []
for _ in range(M):
    A.append(int(input()))
steps = [0]*N
for a in A:
    steps[a-1] = 1
cnt = []
for n in range(N):
    if n == 0:
        if steps[n]==0:
            cnt.append(1)
        elif steps[n]==1:
            cnt.append(0)
    elif n == 1:
        if steps[n]==0:
            cnt.append(cnt[n-1]+1)
        elif steps[n]==1:
            cnt.append(0)
    elif steps[n] == 0:
        cnt.append((cnt[n-2]+cnt[n-1])%mod)
    elif steps[n] == 1:
        cnt.append(0)
print(cnt[-1])

Buggy python submission (verdict: Runtime Error):
N,M = [int(i) for i in input().split()]
A = []
for _ in range(M):
    A.append(int(input()))
def fibo(n):
    if n <= 2:
        return n
    return fibo(n-1) + fibo(n-2)
cnt = 1
for a in range(len(A)+1):
    if a == 0:
        if A[a] == 1:
            width = 1
        else:
            width = A[a]-2
    elif a > 0 and a < M:
        width = A[a] - A[a-1] - 2
    elif a == (M):
        width = N-A[a-1]-1
    if width < 0:
        tmp = 0
        cnt = 0
        break
    else:
        tmp = fibo(width)%1000000007
    cnt = (tmp*cnt)%1000000007
print(cnt)

Fixed submission:
mod = 1000000007
N,M = [int(i) for i in input().split()]
A = []
for _ in range(M):
    A.append(int(input()))
steps = [0]*N
for a in A:
    steps[a-1] = 1
cnt = []
for n in range(N):
    if n == 0:
        if steps[n]==0:
            cnt.append(1)
        elif steps[n]==1:
            cnt.append(0)
    elif n == 1:
        if steps[n]==0:
            cnt.append(cnt[n-1]+1)
        elif steps[n]==1:
            cnt.append(0)
    elif steps[n] == 0:
        cnt.append((cnt[n-2]+cnt[n-1])%mod)
    elif steps[n] == 1:
        cnt.append(0)
print(cnt[-1])

Buggy python submission (verdict: Runtime Error):
N,M = [int(i) for i in input().split()]
A = []
for _ in range(M):
    A.append(int(input()))
def fibo(n):
    if n <= 2:
        return n
    return fibo(n-1) + fibo(n-2)
cnt = 1
for a in range(len(A)+1):
    if a == 0:
        if A[a] == 1:
            width = 1
        else:
            width = A[a]-2
    elif a > 0 and a < M:
        width = A[a] - A[a-1] - 2
    elif a == (M):
        width = N-A[a-1]-1
    if width < 0:
        tmp = 0
        cnt = 0
        break
    else:
        tmp = fibo(width)
    cnt = (tmp*cnt)%1000000007
print(cnt)

Fixed submission:
mod = 1000000007
N,M = [int(i) for i in input().split()]
A = []
for _ in range(M):
    A.append(int(input()))
steps = [0]*N
for a in A:
    steps[a-1] = 1
cnt = []
for n in range(N):
    if n == 0:
        if steps[n]==0:
            cnt.append(1)
        elif steps[n]==1:
            cnt.append(0)
    elif n == 1:
        if steps[n]==0:
            cnt.append(cnt[n-1]+1)
        elif steps[n]==1:
            cnt.append(0)
    elif steps[n] == 0:
        cnt.append((cnt[n-2]+cnt[n-1])%mod)
    elif steps[n] == 1:
        cnt.append(0)
print(cnt[-1])

Buggy python submission (verdict: Runtime Error):
N,M = [int(i) for i in input().split()]
A = []
for _ in range(M):
    A.append(int(input()))
def fibo(n):
    if n <= 2:
        return n
    return fibo(n-1) + fibo(n-2)
cnt = 1
for a in range(len(A)+1):
    if a == 0:
        if A[a] == 1:
            width = 1
        else:
            width = A[a]-2
    elif a > 0 and a < M:
        width = A[a] - A[a-1] - 2
    elif a == (M):
        width = N-A[a-1]-1
    if width < 0:
        tmp = 0
        cnt = 0
        break
    else:
        tmp = fibo(width) % 1000000007
    cnt *= tmp
print(cnt)

Fixed submission:
mod = 1000000007
N,M = [int(i) for i in input().split()]
A = []
for _ in range(M):
    A.append(int(input()))
steps = [0]*N
for a in A:
    steps[a-1] = 1
cnt = []
for n in range(N):
    if n == 0:
        if steps[n]==0:
            cnt.append(1)
        elif steps[n]==1:
            cnt.append(0)
    elif n == 1:
        if steps[n]==0:
            cnt.append(cnt[n-1]+1)
        elif steps[n]==1:
            cnt.append(0)
    elif steps[n] == 0:
        cnt.append((cnt[n-2]+cnt[n-1])%mod)
    elif steps[n] == 1:
        cnt.append(0)
print(cnt[-1])

Buggy python submission (verdict: Runtime Error):
N,M = [int(i) for i in input().split()]
A = []
for _ in range(M):
    A.append(int(input()))
def fibo(n):
    if n <= 2:
        return n
    return fibo(n-1) + fibo(n-2)
cnt = 1
for a in range(len(A)+1):
    if a == 0:
        if A[a] == 1:
            width = 1
        else:
            width = A[a]-2
    elif a > 0 and a < M:
        width = A[a] - A[a-1] - 2
    elif a == (M):
        width = N-A[a-1]-1
    if width < 0:
        tmp = 0
        cnt = 0
        break
    else:
        tmp = fibo(width) % 1000000007
    print(width,tmp)
    cnt *= tmp

Fixed submission:
mod = 1000000007
N,M = [int(i) for i in input().split()]
A = []
for _ in range(M):
    A.append(int(input()))
steps = [0]*N
for a in A:
    steps[a-1] = 1
cnt = []
for n in range(N):
    if n == 0:
        if steps[n]==0:
            cnt.append(1)
        elif steps[n]==1:
            cnt.append(0)
    elif n == 1:
        if steps[n]==0:
            cnt.append(cnt[n-1]+1)
        elif steps[n]==1:
            cnt.append(0)
    elif steps[n] == 0:
        cnt.append((cnt[n-2]+cnt[n-1])%mod)
    elif steps[n] == 1:
        cnt.append(0)
print(cnt[-1])