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    "https://leetcode.com/problems/backspace-string-compare\n",
    "\n",
    "\n",
    "\n",
    "Runtime: 172 ms, faster than 11.11% of Kotlin online submissions for Backspace String Compare.\n",
    "Memory Usage: 35.4 MB, less than 7.41% of Kotlin online submissions for Backspace String Compare.\n",
    "\n",
    "\n",
    "\n",
    "```kotlin\n",
    "class Solution {\n",
    "    fun inputBox(s: String): String {\n",
    "        var r = \"\"\n",
    "        for ((i, c) in s.withIndex()) {\n",
    "            if (c == '#') {\n",
    "                if (r.length > 0) {\n",
    "                    r = r.dropLast(1)\n",
    "                }\n",
    "            } else {\n",
    "                r = r.plus(c)\n",
    "            }\n",
    "        }\n",
    "        return r\n",
    "    }\n",
    "\n",
    "    fun backspaceCompare(S: String, T: String): Boolean {\n",
    "        return inputBox(S) == inputBox(T)\n",
    "    }\n",
    "}\n",
    "\n",
    "fun main(args: Array<String>) {\n",
    "    var s = Solution()\n",
    "    println(s.backspaceCompare(\"abc\", \"bca\"))\n",
    "}\n",
    "```"
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