Where's the image/figure?

"A rectangular room of size M×N (first along the horizontal, then along the vertical) is tiled with triangular tiles, which are numbered as shown in the figure."

Exactly what is "norm"? is it average(sum A / len A) or like [2,3,4] for input [5,4,8,1,6]?

asdasdas try to use each rule's description. Example: if heads are odd number, we can NEVER kill the dragon since cutting one-by-one doesn't change the head count, and cutting two-by-two, yes, decreases the count ttwo-by-two, but since the number is odd, that odd can never be cut.

This was just an example, try to combine each rule and their "affect to the count of N/M" to solve the problem.

Btw it's a math problem, no dynamic programming or matrix