I got AC http://acm.hunnu.edu.cn/online/?action=problem&type=show&id=10161&courseid=0, but here I got WA1. Why???

Now TL on test#1, what's wrong, I don't understand everything

I also got AC out there. 250 ms. 1300 kb.
Here I got TLE. 102 kb.

using long long rather than int