int input int input for in range if print else ans for in range ans mi

n = int(input())
e = [int(input()) for i in range(n)]
if n < 6:
    print(1)
else:
    ans = e[0] ** 2 + e[5] ** 2
    for i in range(1, n - 5):
        ans = min(ans, e[i] ** 2 + e[i + 5] ** 2)
    print(ans)