Create car-pooling.cpp

Author: kamyu104

C++/car-pooling.cpp

@@ -0,0 +1,19 @@
+// Time:  O(nlogn)
+// Space: O(n)
+
+class Solution {
+public:
+    bool carPooling(vector<vector<int>>& trips, int capacity) {
+        map<int, int> lookup;
+        for (const auto& trip : trips) {
+            lookup[trip[1]] += trip[0];
+            lookup[trip[2]] -= trip[0];
+        }
+        for (const auto& [location, num] : lookup) {
+            if ((capacity -= num) < 0) {
+                return false;
+            }
+        }
+        return true;
+    }
+};