Add week 2 solutions: encode-and-decode-strings

Author: gitsunmin

encode-and-decode-strings/gitsunmin.ts

@@ -0,0 +1,14 @@
+/**
+ * https://www.lintcode.com/problem/659/
+ * time complexity : O(n)
+ * space complexity : O(n)
+ * ! emoji는 입력에서 제외한다.
+ */
+
+function encode(input: Array<string>): string {
+    return input.join("😀");
+}
+
+function decode(input: string): Array<string> {
+    return input.split("😀");
+}