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#打印斐波拉契数列
#!/usr/bin/python
def feibolaqi(n):
if n == 0 or n == 1:
return n
else:
return feibolaqi(n-1) + feibolaqi(n-2)
num = int(raw_input('please input a int:'))
if num >= 0:
print 'feibolaqi(%d) is %d' % (num,feibolaqi(num))
else:
print 'input is wrong'
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