Пример использования массивов

n = int(input())
a = []
for i in range(n):
    a.append(int(input()))
s1 = 0
for i in range(0, n//2):
    s1+=a[i]
s2 = 0
for i in range(n//2, n):
    s2+=a[i]
print(s1, s2)