Control the Pollution

There are two types of vehicles in Chefland. - **Bus** which has a capacity of $100$ people. - **Car** which has a capacity of $4$ people. There are $N$ people who want to travel from place $A$ to place $B$. You know that a single bus emits $X$ units of smoke while a single car emits $Y$ units of smoke in their journey from $A$ to $B$. You want to arrange some buses and cars to carry all these $