Update LFUCache.h

Author: zennyMe17

include/LFUCache.h

@@ -19,6 +19,8 @@ class LFUCache {
 private:
     void touch(int key);
     void evict();
+    // Add this line in both LRUCache.h and LFUCache.h
+    void reset();
 
     size_t capacity;
     std::unordered_map<int, std::pair<int, int>> cache; // key -> {value, frequency}