N = int(input())
A = sorted(map(int, input().split()))
ans = S = sum(A[:-1]) + A[-1]%A[0]
for i in range(1, N-1):
	ans = max(ans, S - A[i] - A[-1]%A[0] + A[-1]%A[i] + A[i]%A[0])
print(ans)