1701 - Average Waiting Time

 JAVA

• class Solution {
      public double averageWaitingTime(int[][] customers) {
          double tot = 0;
          int t = 0;
          for (var e : customers) {
              int a = e[0], b = e[1];
              t = Math.max(t, a) + b;
              tot += t - a;
          }
          return tot / customers.length;
      }
  }

C++

• class Solution {
  public:
      double averageWaitingTime(vector<vector<int>>& customers) {
          double tot = 0;
          int t = 0;
          for (auto& e : customers) {
              int a = e[0], b = e[1];
              t = max(t, a) + b;
              tot += t - a;
          }
          return tot / customers.size();
      }
  };