leetcode

0 class Solution {

1 public:

2 double averageWaitingTime(const vector<vector<int>> &customers) {

3 const int n = customers.size();

4 double time = 0, res = 0;

5 for (int i = 0; i < n; i++) {

6 if (time < customers[i][0])

7 time = customers[i][0];

8 else

9 res += time - customers[i][0];

10 time += customers[i][1];

11 res += customers[i][1];

12 }

13 return res / n;

14 }

15 };