You are given an array, routes, representing bus routes where routes[i] is a bus route that the ith bus repeats forever. Every route contains one or more stations. You have also been given the source station, src, and a destination station, des. Return the minimum number of buses someone must take to travel from src to dest, or return -1 if there is no route.
Constraints:
routes.length ≤50routes[i].length You are given an array, routes, representing bus routes where routes[i] is a bus route that the ith bus repeats forever. Every route contains one or more stations. You have also been given the source station, src, and a destination station, des. Return the minimum number of buses someone must take to travel from src to dest, or return -1 if there is no route.
Constraints:
routes.length ≤50routes[i].length