Binod And Binod

Binod was free with no work to do. So he asks Binod for some task. Binod gives him two different bundles of sticks, let's call them $X$ & $Y$. In bundle $X$ there are $N$ sticks arranged in a row such that $X_i$ denotes height of $i^{th}$ stick in bundle $X$. Similarly in bundle $Y$ there are $M$ sticks given, $M<=N$ such that $Y_i$ denotes height of $i^{th}$ stick in bundle $Y$. Binod also gives