Have you ever tried the vjudgian theorem in any contest?Do you know that the last two contests' problems can be perfectly solved using the vjudgian theorem?The implementation of the vjudgian theorem is easier than fft and dp and dijkstra and segment tree and convex hull and even faster than o(1).I will shortly post an editorial to problem H2 of the last div 1+2 contest to teach newbies and stupid contestants how to use it.Finally,the vjudgian theorem can make you like the gigachad stO De3bOo Orz!