<pre><code>n = int(input())
a = [int(x) for x in input().split()]
product = 0
for i in range(n):
for j in range(i + 1, n):
product = max(product, a[i] * a[j])
print(product)
</code></pre>
<p>当我把上面的代码提交给Corsera的代码判断系统时</p>
<p><code>Failed case #4/17: time limit exceeded (Time used: 9.98/5.00, memory used: 20918272/536870912.)</code></p>
<p>已经归还。
我怎样才能改变它?你知道吗</p>