Average Waiting Time LeetCode solution in Java

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class Solution {
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  public double averageWaitingTime(int[][] customers) {
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    double time = 0;
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    double waitingTime = 0;
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    for (int[] cust : customers) {
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      time = Math.max(cust[0], time);
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      time = time + cust[1];
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      waitingTime += (time - cust[0]);
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    }
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    return waitingTime / customers.length;
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  }
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}