feat(leetcode): add 2665 easy

leetcode-easy/2620-counter.ts

@@ -4,6 +4,8 @@ function createCounter(n: number): () => number {
   }
 }
 
+export { createCounter }
+
 /**
  * const counter = createCounter(10)
  * counter() // 10

leetcode-easy/2665-counter-II.ts

@@ -0,0 +1,37 @@
+type ReturnObj = {
+  increment: () => number
+  decrement: () => number
+  reset: () => number
+}
+
+function createCounter(init: number): ReturnObj {
+  let currentValue = init
+
+  return {
+    increment() {
+      currentValue++
+      return currentValue
+    },
+    decrement() {
+      currentValue--
+      return currentValue
+    },
+    reset() {
+      currentValue = init
+      return currentValue
+    },
+  }
+}
+
+export { createCounter }
+
+/**
+ * const counter = createCounter(5)
+ * counter.increment(); // 6
+ * counter.reset(); // 5
+ * counter.decrement(); // 4
+ */
+
+// 2023/05/07 done
+// Runtime 74 ms Beats 56.14%
+// Memory 45.4 MB Beats 73.68%