a = map(int,input().split()) / a = list(map(int,input().split())) 차이

>>> a = map(int,input().split())
1 2 3
>>> a
<map object at 0x000001F835236B80>
>>> type(n)
<class 'map'>

>>> a = list(map(int,input().split()))
1 2 3
>>> a
[1, 2, 3]
>>> n[0]
1
>>> type(n)
<class 'list'>