public class Solution
extends Object
1010 - Pairs of Songs With Total Durations Divisible by 60\.
Medium
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`