encode and decode strings

Author: 이연수

encode-and-decode-strings/EcoFriendlyAppleSu.kt

@@ -0,0 +1,33 @@
+package leetcode_study
+
+/*
+* 문자열 인코딩 디코딩 문제
+* 시간 복잡도: O(n)
+* 공간 복잡도: O(n)
+* */
+fun encoding(strs: List<String>): String {
+    var result = ""
+    if (strs.isEmpty()) return result
+    for (index in 0 until strs.size - 1) {
+        if (strs[index] == ":") {
+            result += strs[index] + "::;"
+        } else {
+            result += strs[index] + ":;"
+        }
+    }
+    result += strs[strs.size - 1]
+    return result
+}
+
+fun decoding(str: String): List<String>{
+    val splitedStrList = str.split(":;")
+    val result = mutableListOf<String>()
+    for (splitStr in splitedStrList){
+        if (splitStr == "::") {
+            result.add(":")
+        } else {
+            result.add(splitStr)
+        }
+    }
+    return result
+}