http://codeforces.net/problemset/problem/542/B.
my n^2*log(n) solution with prunning got Accepted and worst case is n==10000,run 951ms(not n==200000),hope admin can add a lot of big test cases,I think test cases for a problem at least 100+ is suitable(with a lot of construct test cases),but this problem there is only 37 cases....
hello
You are my hero, dude!