OJ Board

The TopCoder links are broken. Could someone point or explain a better solution than exhaustive search?

Perhaps solving the implicit linear equations system?

Thanks in advance.

I'm calculating Bell's numbers using Bell's triangle (as calculating Stirling numbers of the 2nd kind is too slow) and my custom BigInteger class to solve this problem and I get the correct answer, however I'm getting TLE. I keep only prev and current lines of the triangle to lower memory usage. I ...