feat: solve new question

Author: arwildo

car-fleet/main.js

@@ -0,0 +1,21 @@
+/**
+ * @param {number} target
+ * @param {number[]} position
+ * @param {number[]} speed
+ * @return {number}
+ */
+var carFleet = function(target, position, speed) {
+    const cars = position.map((pos, idx) => [pos, speed[idx]]);
+    cars.sort((a, b) => b[0] - a[0]);
+    const stack = [];
+
+    for (const [pos, speed] of cars) {
+        let time = (target - pos) / speed;
+
+        if (stack.length == 0 || time > stack[stack.length - 1]) {
+            stack.push(time);
+        }
+    }
+
+    return stack.length;
+};