Create 1701-average-waiting-time.js

Author: everthis

1701-average-waiting-time.js

@@ -0,0 +1,17 @@
+/**
+ * @param {number[][]} customers
+ * @return {number}
+ */
+const averageWaitingTime = function(customers) {
+  const n = customers.length
+  let start = customers[0][0], end = start + customers[0][1]
+  let sum = end - start
+  for(let i = 1; i < n; i++) {
+    end = end > customers[i][0] ? end + customers[i][1] : customers[i][0] + customers[i][1]
+    sum += (end - customers[i][0])
+  }
+  
+  let res = sum / n
+  
+  return res
+};