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Each new term in the Fibonacci sequence is generated by adding the previous two terms. By starting with 1 and 2, the first 10 terms will be:
1, 2, 3, 5, 8, 13, 21, 34, 55, 89, ...
By considering the terms in the Fibonacci sequence whose values do not exceed four million, find the sum of the even-valued terms.
a=1
b=2
c=a+b
result=2;
while c<4000000:
a=b
b=c
c=a+b
if c%2==0:
result+=c
print(result)
输出结果： 4613732
用时：小于1s
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原文地址：http://blog.csdn.net/zhangzhengyi03539/article/details/43157603
