Codewars note:Number of People in the Bus

Solition:
def number(bus_stops): return sum([i[0] - i[1] for i in bus_stops])
def number(bus_stops): return sum(on - off for on, off in bus_stops)

Solition:
def number(bus_stops): return sum([i[0] - i[1] for i in bus_stops])
def number(bus_stops): return sum(on - off for on, off in bus_stops)