N = int(input())
A = [int(i) for i in input().split()]
ans = A[0]
for i in range(1,N):
    if ans+A[i]>=ans*A[i] and ans+A[i]>=ans/A[i] and ans+A[i]>=ans-A[i]:
        ans += A[i]
    elif ans-A[i]>ans*A[i] and ans-A[i]>ans/A[i] and ans-A[i]>ans+A[i]:
        ans -= A[i]
    elif ans*A[i]>ans+A[i] and ans*A[i]>ans-A[i] and ans*A[i]>ans/A[i]:
        ans *= A[i]
    else:
        ans /= A[i]
print(ans)