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1010. Pairs of Songs With Total Durations Divisible by 60 👍

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class Solution {
 public:
  int numPairsDivisibleBy60(vector<int>& time) {
    int ans = 0;
    vector<int> count(60);

    for (int t : time) {
      t %= 60;
      ans += count[(60 - t) % 60];
      ++count[t];
    }

    return ans;
  }
};

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class Solution {
  public int numPairsDivisibleBy60(int[] time) {
    int ans = 0;
    int[] count = new int[60];

    for (int t : time) {
      t %= 60;
      ans += count[(60 - t) % 60];
      ++count[t];
    }

    return ans;
  }
}

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class Solution:
  def numPairsDivisibleBy60(self, time: list[int]) -> int:
    ans = 0
    count = [0] * 60

    for t in time:
      t %= 60
      ans += count[(60 - t) % 60]
      count[t] += 1

    return ans