There are `n` flights that are labeled from `1` to `n`.

You are given an array of flight bookings `bookings`, where `bookings[i] = [firsti, lasti, seatsi]` represents a booking for flights `firsti` through `lasti` (inclusive) with `seatsi` seats reserved for each flight in the range.

Return an array `answer` of length `n`, where `answer[i]` is the total number of seats reserved for flight `i`.

Example 1:

    Input: bookings = [[1,2,10],[2,3,20],[2,5,25]], n = 5
    Output: [10,55,45,25,25]
    Explanation:
    Flight labels:        1   2   3   4   5
    Booking 1 reserved:  10  10
    Booking 2 reserved:      20  20
    Booking 3 reserved:      25  25  25  25
    Total seats:         10  55  45  25  25
    Hence, answer = [10,55,45,25,25]

Example 2:

    Input: bookings = [[1,2,10],[2,2,15]], n = 2
    Output: [10,25]
    Explanation:
    Flight labels:        1   2
    Booking 1 reserved:  10  10
    Booking 2 reserved:      15
    Total seats:         10  25
    Hence, answer = [10,25]

Constraints:

- `1 <= n <= 2 * 104`
- `1 <= bookings.length <= 2 * 104`
- `bookings[i].length == 3`
- `1 <= firsti <= lasti <= n`
- `1 <= seatsi <= 104`