Buggy python submission (verdict: Time Limit Exceeded):
n,m = map(int,input().split())
diff = abs(n-m)
count1 = 1
count2 = 1
a = 1

def saiki(n):
    if n<=1:
        return 1
    return n * saiki(n-1)
if diff >= 2:
    print(0)
elif diff == 1:
    for i in range(1,max(n,m)+1):
        count1 *= i
    '''
    for i in range(1,(min(n,m)+1)):
        count2 *= i
    '''

    print(count1*(count1//max(n,m))%(10**9+7))
else:
    for i in range(1,n+1):
        count1 *= i
    print(count1*count1*2%(10**9+7))


Fixed submission:
import math
n,m = map(int,input().split())
diff = abs(n-m)
count1 = 1
count2 = 1
a = 1

if diff >= 2:
    print(0)
elif diff == 1:
    ans = math.factorial(max(n,m))
    print(ans*(ans//max(n,m))%(10**9+7))
else:
    ans = math.factorial(n)
    print(ans*ans*2%(10**9+7))

Buggy python submission (verdict: Time Limit Exceeded):
n,m = map(int,input().split())
diff = abs(n-m)
count1 = 1
count2 = 1
def saiki(n):
    if n<=1:
        return 1
    return n * saiki(n-1)
if diff >= 2:
    print(0)
elif diff == 1:
    for i in range(1,max(n,m)+1):
        count1 *= i
    '''
    for i in range(1,(min(n,m)+1)):
        count2 *= i
    '''
    print(count1*(count1//max(n,m))%(10**9+7))
else:
    for i in range(1,n+1):
        count1 *= i
    print(count1*count1*2%(10**9+7))


Fixed submission:
import math
n,m = map(int,input().split())
diff = abs(n-m)
count1 = 1
count2 = 1
a = 1

if diff >= 2:
    print(0)
elif diff == 1:
    ans = math.factorial(max(n,m))
    print(ans*(ans//max(n,m))%(10**9+7))
else:
    ans = math.factorial(n)
    print(ans*ans*2%(10**9+7))

Buggy python submission (verdict: Time Limit Exceeded):
n,m = map(int,input().split())
diff = abs(n-m)
count1 = 1
count2 = 1
def saiki(n):
    if n<=1:
        return 1
    return n * saiki(n-1)
if diff >= 2:
    print(0)
elif diff == 1:
    for i in range(1,max(n,m)+1):
        count1 *= i
    for i in range(1,(min(n,m)+1)):
        count2 *= i
    print(count1*count2%(10**9+7))
else:
    for i in range(1,n+1):
        count1 *= i
    print(count1*count1*2%(10**9+7))


Fixed submission:
import math
n,m = map(int,input().split())
diff = abs(n-m)
count1 = 1
count2 = 1
a = 1

if diff >= 2:
    print(0)
elif diff == 1:
    ans = math.factorial(max(n,m))
    print(ans*(ans//max(n,m))%(10**9+7))
else:
    ans = math.factorial(n)
    print(ans*ans*2%(10**9+7))

Buggy python submission (verdict: Time Limit Exceeded):
n,m = map(int,input().split())
diff = abs(n-m)
count1 = 1
count2 = 1
def saiki(n):
    if n<=1:
        return 1
    return n * saiki(n-1)
if diff >= 2:
    print(0)
elif diff == 1:
    #print((saiki(max(n,m))*saiki(min(n,m)))%(10**9+7))
    for i in range(1,max(n,m)+1):
        count1 *= i%(10**9+7)
    for i in range(1,(min(n,m)+1)):
        count2 *= i%(10**9+7)
    print(count1*count2)
else:
    #print((saiki(n)*saiki(m)*2)%(10**9+7))
    for i in range(1,n+1):
        count1 *= i%(10**9+7)
    print(count1*count1*2)


Fixed submission:
import math
n,m = map(int,input().split())
diff = abs(n-m)
count1 = 1
count2 = 1
a = 1

if diff >= 2:
    print(0)
elif diff == 1:
    ans = math.factorial(max(n,m))
    print(ans*(ans//max(n,m))%(10**9+7))
else:
    ans = math.factorial(n)
    print(ans*ans*2%(10**9+7))

Buggy python submission (verdict: Runtime Error):
import sys
sys.setrecursionlimit(100000)
n,m = map(int,input().split())
diff = abs(n-m)
def saiki(n):
    if n<=1:
        return 1
    return n * saiki(n-1)
if diff >= 2:
    print(0)
elif diff == 1:
    print((saiki(max(n,m))*saiki(min(n,m)))%(10**9+7))
else:
    print((saiki(n)*saiki(m)*2)%(10**9+7))


Fixed submission:
import math
n,m = map(int,input().split())
diff = abs(n-m)
count1 = 1
count2 = 1
a = 1

if diff >= 2:
    print(0)
elif diff == 1:
    ans = math.factorial(max(n,m))
    print(ans*(ans//max(n,m))%(10**9+7))
else:
    ans = math.factorial(n)
    print(ans*ans*2%(10**9+7))

Buggy python submission (verdict: Runtime Error):
import sys
sys.setrecursionlimit(10000)
n,m = map(int,input().split())
diff = abs(n-m)
def saiki(n):
    if n<=1:
        return 1
    return n * saiki(n-1)
if diff >= 2:
    print(0)
elif diff == 1:
    print((saiki(max(n,m))*saiki(min(n,m)))%(10**9+7))
else:
    print((saiki(n)*saiki(m)*2)%(10**9+7))


Fixed submission:
import math
n,m = map(int,input().split())
diff = abs(n-m)
count1 = 1
count2 = 1
a = 1

if diff >= 2:
    print(0)
elif diff == 1:
    ans = math.factorial(max(n,m))
    print(ans*(ans//max(n,m))%(10**9+7))
else:
    ans = math.factorial(n)
    print(ans*ans*2%(10**9+7))