You are given a list of songs where the `ith` song has a duration of `time[i]` seconds.

Return the number of pairs of songs for which their total duration in seconds is divisible by `60`. Formally, we want the number of indices `i`, `j` such that `i < j` with `(time[i] + time[j]) % 60 == 0`.

Example 1:

    Input: time = [30,20,150,100,40]
    Output: 3
    Explanation: Three pairs have a total duration divisible by 60:
    (time[0] = 30, time[2] = 150): total duration 180
    (time[1] = 20, time[3] = 100): total duration 120
    (time[1] = 20, time[4] = 40): total duration 60

Example 2:

    Input: time = [60,60,60]
    Output: 3
    Explanation: All three pairs have a total duration of 120, which is divisible by 60.

Constraints:

- `1 <= time.length <= 6 * 104`
- `1 <= time[i] <= 500`