Merge Sort Run error

#1

def merge(s,e,a=[]):

mid=(s+e)//2

i=s

j=mid+1

temp=[]



while(i<=mid and j<=e):

    if(a[i]<a[j]):

        temp.append(a[i])

        i+=1

    

    else:

        temp.append(a[j])

        j+=1

while(i<=mid):

    temp.append(a[i])

    i+=1

while(j<=e):

    temp.append(a[j])

    j+=1

a[s:e+1]=temp

def mergeSort(s,e,a=[]):

if(s>=e):

    return

mid=(s+e)//2

mergeSort(s,mid,a)

mergeSort(mid+1,e,a)



merge(s,e,a)

n=int(input())

b=input()

a=[int(i) for i in b.split(’ ')]

mergeSort(0,n-1,a)

for i in range(len(a)):

print(a[i],end=" ")

Here is my code which is working properly on jupyter notebook but not at submitting time as it show run-error and also it is working properly on custom input.
Please anyone check this and help me out