A certain electronic insect falls on a certain point Ko on the number axis and starts to jump from Ko. In the first time, it jumps left by 1 unit length to K to K1. In the second time, it jumps right by K1 by 2 unit length to K2. In the third time, it jumps left by K2 by 3 unit length to K3. In the fourth time, it jumps right by K3 by 4 unit length to K4, When it falls for the 100th time, the number of k100 on the number axis is exactly 2008, so the number of Ko is ()

A certain electronic insect falls on a certain point Ko on the number axis and starts to jump from Ko. In the first time, it jumps left by 1 unit length to K to K1. In the second time, it jumps right by K1 by 2 unit length to K2. In the third time, it jumps left by K2 by 3 unit length to K3. In the fourth time, it jumps right by K3 by 4 unit length to K4, When it falls for the 100th time, the number of k100 on the number axis is exactly 2008, so the number of Ko is ()

-1,1,-2,2,-3,3,...
The 100th time = 50
2008-50 = 1958, the initial position of the electronic insect Ko is (1958)