There is a row of numbers: 1, 1, 2, 3, 5, 8, 13, 21, ..., starting from the third number, each number is the sum of the previous two numbers, among the first 2007 numbers, there is How much is an even number.
有一行数：1，1，2，3，5，8，13，21，…，从第三个数开始，每个数都是前两个数的和，问在前2007个数中，有多少是偶数．
<result>699</result>