Buggy python submission (verdict: Runtime Error):
N,M = map(int,input().split())
a = []
for i in range(M):
    a.append(int(input()))

def fibo(n):
    a, b = 1, 1
    if (n == 0) or (n == 1) or (n == 2):
        return 1
    else:
        for _ in range(n-2):
            a, b = b, a + b
        return b

aa = [] #aの差を取ったもののリスト
for k in range(M-1):
    aa.append(a[k+1] - a[k] - 1)
#print(aa)
#aa.append(N - a(M))

if 0 in aa:
    ans = 0

else:
    ans = 1
    ans_list = []
    for i in range(M-1):
        ans_list.append(fibo(aa[i]))

    ans_list.append(fibo(a[0]))
    ans_list.append(fibo(N - a[M-1]))
    #print(ans_list)
    
    for i in range (len(ans_list)):
        ans = (ans * ans_list[i]) % (10**9 + 7)

print(ans)


Fixed submission:
N,M = map(int,input().split())
a = []
if M >= 1:
    for i in range(M):
        a.append(int(input()))

def fibo(n):
    a, b = 1, 1
    if (n == 0) or (n == 1) or (n == 2):
        return 1
    else:
        for _ in range(n-2):
            a, b = b, a + b
        return b

aa = [] #aの差を取ったもののリスト
if M >= 2:
    for k in range(M-1):
        aa.append(a[k+1] - a[k] - 1)
#print(aa)
#aa.append(N - a(M))

    if 0 in aa:
        ans = 0

    else:
        ans = 1
        ans_list = []
        for i in range(M-1):
            ans_list.append(fibo(aa[i]))

        ans_list.append(fibo(a[0]))
        ans_list.append(fibo(N - a[M-1]))
    #print(ans_list)
    
        for i in range (len(ans_list)):
            ans = (ans * ans_list[i]) % (10**9 + 7)

elif M == 1:
    ans_list = []
    ans_list.append(fibo(a[0]))
    ans_list.append(fibo(N - a[0]))
    ans = (ans_list[0] * ans_list[1]) % (10**9 + 7)

elif M == 0:
    ans = fibo(N+1) % (10**9 + 7)

print(ans)

Buggy python submission (verdict: Runtime Error):
N,M = map(int,input().split())
a = []
for i in range(M):
    a.append(int(input()))

def fibo(x2):
    if (x2 == 1) or (x2 == 2):
        return (1)
    else:
        return((fibo(x2-1) + fibo(x2-2)) % (10**9 + 7))

aa = [] #aの差を取ったもののリスト
for k in range(M-1):
    aa.append(a[k+1] - a[k] - 1)
#print(aa)
#aa.append(N - a(M))

if 0 in aa:
    ans = 0

else:
    ans = 1
    ans_list = []
    for i in range(M-1):
        if aa[i] >= 1:
            ans_list.append(fibo(aa[i]))

    ans_list.append(fibo(a[0]))
    ans_list.append(fibo(N - a[M-1]))
    #print(ans_list)
    
    for i in range (len(ans_list)):
        ans = (ans * ans_list[i]) % (10**9 + 7)

print(ans)


Fixed submission:
N,M = map(int,input().split())
a = []
if M >= 1:
    for i in range(M):
        a.append(int(input()))

def fibo(n):
    a, b = 1, 1
    if (n == 0) or (n == 1) or (n == 2):
        return 1
    else:
        for _ in range(n-2):
            a, b = b, a + b
        return b

aa = [] #aの差を取ったもののリスト
if M >= 2:
    for k in range(M-1):
        aa.append(a[k+1] - a[k] - 1)
#print(aa)
#aa.append(N - a(M))

    if 0 in aa:
        ans = 0

    else:
        ans = 1
        ans_list = []
        for i in range(M-1):
            ans_list.append(fibo(aa[i]))

        ans_list.append(fibo(a[0]))
        ans_list.append(fibo(N - a[M-1]))
    #print(ans_list)
    
        for i in range (len(ans_list)):
            ans = (ans * ans_list[i]) % (10**9 + 7)

elif M == 1:
    ans_list = []
    ans_list.append(fibo(a[0]))
    ans_list.append(fibo(N - a[0]))
    ans = (ans_list[0] * ans_list[1]) % (10**9 + 7)

elif M == 0:
    ans = fibo(N+1) % (10**9 + 7)

print(ans)

Buggy python submission (verdict: Runtime Error):
N,M = map(int,input().split())
a = []
for i in range(M):
    a.append(int(input()))

def fibo(x2):
    if (x2 == 1) or (x2 == 2):
        return (1)
    else:
        return((fibo(x2-1) + fibo(x2-2)) % (10**9 + 7))

aa = [] #aの差を取ったもののリスト
for k in range(M-1):
    aa.append(a[k+1] - a[k] - 1)
print(aa)
#aa.append(N - a(M))

if 0 in aa:
    ans = 0

else:
    ans = 1
    ans_list = []
    for i in range(M-1):
        if aa[i] >= 1:
            ans_list.append(fibo(aa[i]))

    ans_list.append(fibo(a[0]))
    ans_list.append(fibo(N - a[M-1]))
    print(ans_list)
    
    for i in range (len(ans_list)):
        ans = (ans * ans_list[i]) % (10**9 + 7)

print(ans)


Fixed submission:
N,M = map(int,input().split())
a = []
if M >= 1:
    for i in range(M):
        a.append(int(input()))

def fibo(n):
    a, b = 1, 1
    if (n == 0) or (n == 1) or (n == 2):
        return 1
    else:
        for _ in range(n-2):
            a, b = b, a + b
        return b

aa = [] #aの差を取ったもののリスト
if M >= 2:
    for k in range(M-1):
        aa.append(a[k+1] - a[k] - 1)
#print(aa)
#aa.append(N - a(M))

    if 0 in aa:
        ans = 0

    else:
        ans = 1
        ans_list = []
        for i in range(M-1):
            ans_list.append(fibo(aa[i]))

        ans_list.append(fibo(a[0]))
        ans_list.append(fibo(N - a[M-1]))
    #print(ans_list)
    
        for i in range (len(ans_list)):
            ans = (ans * ans_list[i]) % (10**9 + 7)

elif M == 1:
    ans_list = []
    ans_list.append(fibo(a[0]))
    ans_list.append(fibo(N - a[0]))
    ans = (ans_list[0] * ans_list[1]) % (10**9 + 7)

elif M == 0:
    ans = fibo(N+1) % (10**9 + 7)

print(ans)

Buggy python submission (verdict: Runtime Error):
N,M = map(int,input().split())
a = []
for i in range(M):
    a.append(int(input()))

def fibo(x2):
    if (x2 == 1) or (x2 == 2):
        return (1)
    else:
        return((fibo(x2-1) + fibo(x2-2)) // (10**9 + 7))

aa = []
#aa.append(a[0]-)
for k in range(M-1):
    aa.append(a[k+1] - a[k] - 1)
#aa.append(N - a(M))

if 0 in aa:
    ans = 0

else:
    ans_list = []
    for i in range(M-1):
        if aa[i] >= 1:
            ans_list.append(fibo(aa[i]))

	ans_list.append(fibo(a[1])
	ans_list.append(fibo(N - a[M]))

	ans = (sum(ans_list) // (10**9 + 7))

print(ans)


Fixed submission:
N,M = map(int,input().split())
a = []
if M >= 1:
    for i in range(M):
        a.append(int(input()))

def fibo(n):
    a, b = 1, 1
    if (n == 0) or (n == 1) or (n == 2):
        return 1
    else:
        for _ in range(n-2):
            a, b = b, a + b
        return b

aa = [] #aの差を取ったもののリスト
if M >= 2:
    for k in range(M-1):
        aa.append(a[k+1] - a[k] - 1)
#print(aa)
#aa.append(N - a(M))

    if 0 in aa:
        ans = 0

    else:
        ans = 1
        ans_list = []
        for i in range(M-1):
            ans_list.append(fibo(aa[i]))

        ans_list.append(fibo(a[0]))
        ans_list.append(fibo(N - a[M-1]))
    #print(ans_list)
    
        for i in range (len(ans_list)):
            ans = (ans * ans_list[i]) % (10**9 + 7)

elif M == 1:
    ans_list = []
    ans_list.append(fibo(a[0]))
    ans_list.append(fibo(N - a[0]))
    ans = (ans_list[0] * ans_list[1]) % (10**9 + 7)

elif M == 0:
    ans = fibo(N+1) % (10**9 + 7)

print(ans)