http://codeforces.net/contest/439/submission/27259616

I got WA on test case 3, but I get the right answer when I test the same code in my sublime text. (Or even in http://ideone.com/jcoVSl)

Can somebody please help me?

[Solved] finv[n-k] is out of bound when n < k new submission: http://codeforces.net/contest/439/submission/27265838