Mishra and his sons

Mishra has $N$ sons. He has $N$ candies and $N$ cookies . 1. the ith candy has a price $a_i$ , where all the ai are pairwise distinct (i.e. all $a_i$ are different), 2. the ith cookie has a price $b_i$ , where all the bi are pairwise distinct (i.e. all $b_i$ are different). Mishra wants to give only one candy and only one cookie to each of his sons. To make sure that all of them ge