/*### Total number of drivers online on Uber - Input: List of tuples (timestamp, #drivers) for 2 cities - Output: List of tuples with combined number of drivers in both cities for existing timestamps. ```jsx /* Bangalore [[1:00, 10], [1:15, 20], [1:05, 12], [2:00, 9]] */ /* Kolkata [[1:03, 11], [1:30, 3], [2:30, 4], [1:15 11]] */ /* total [[1:00, 10], [1:03, 11], [1:05, 12], [1:15, 31], [1:30, 3], [2:00, 9], [2:30, 4]] */ // var blr1 = [['1:00', 10], ['1:15', 20], ['1:05', 12], ['2:00', 9]] // var kol1 = [['1:03', 11], ['1:30', 3], ['2:30', 4], ['1:15', 11]] // var output1 = mergeDrivers(blr, kol)
