擅长:python、mysql、java
<p>这就是你能做到的。这类似于斐波那契序列</p>
<pre><code>n1 = 1
n2 = 2
n3 = 3
m = int(input("number: "))
if m < 4:
if m == n1:
print(n1)
elif m == n2:
print(n2)
elif m == n3:
print(n3)
else:
for i in range(3, m):
temp1, temp2 = n2, n3
n3 = n1 * n2 - n3
n1, n2 = temp1, temp2
print(n3)
</code></pre>