Comment by jojomodding

2 days ago

LeetCode problems typically are in P. The challenge is finding out why.

Yeah I think the trivial solution is always harder complexity and the main challenge is to lower it. Either from NP to P or from n*2 to n log n.

  • > or from n*2 to n log n.

    I guess you mean n^2 (or maybe n**2, if you're a fellow Pythonista). Many of these — especially the ones where the intended solution is characterized as using a "dynamic programming" technique — are reducible to n.