@@ -140,7 +140,7 @@
 | `leetcode.defaultLanguage` | Specify the default language used to solve the problem. Supported languages are: `bash`, `c`, `cpp`, `csharp`, `golang`, `java`, `javascript`, `kotlin`, `mysql`, `php`, `python`,`python3`,`ruby`,`rust`, `scala`,`swift` | `N/A` |
 | `leetcode.useWsl` | Specify whether to use WSL or not | `false` |
 | `leetcode.endpoint` | Specify the active endpoint. Supported endpoints are: `leetcode`, `leetcode-cn` | `leetcode` |
-| `leetcode.outputFolder` | Specify the relative path to save the problem files. Besides using customized path, there are also several reserved words which can be used here: <ul><li>`${tag}`: Categorize the problem according to their tags.<li>`${language}`: Categorize the problem according to their language.</li><li>`${difficulty}`: Categorize the problem according to their difficulty.</li></ul> | N/A |
+| `leetcode.outputFolder` | Specify the relative path to save the problem files. Besides using customized path, there are also several reserved words which can be used here: <ul><li>`${tag}`: Categorize the problem according to their tags.<li>`${language}`: Categorize the problem according to their language.</li><li>`${difficulty}`: Categorize the problem according to their difficulty.</li></ul>For example: `problem-${tag}-${difficulty}` | N/A |
 | `leetcode.enableStatusBar` | Specify whether the LeetCode status bar will be shown or not. | `true` |
 | `leetcode.enableShortcuts` | Specify whether the submit and test shortcuts in editor or not. | `true` |
 | `leetcode.enableSideMode` | Specify whether `preview`, `solution` and `submission` tab should be grouped into the second editor column when solving a problem. | `true` |

@@ -140,7 +140,7 @@
 | `leetcode.defaultLanguage` | 指定答题时使用的默认语言，可选语言有：`bash`, `c`, `cpp`, `csharp`, `golang`, `java`, `javascript`, `kotlin`, `mysql`, `php`, `python`,`python3`,`ruby`, `rust`, `scala`,`swift` | `N/A` |
 | `leetcode.useWsl` | 指定是否启用 WSL | `false` |
 | `leetcode.endpoint` | 指定使用的终端，可用终端有：`leetcode`, `leetcode-cn` | `leetcode` |
-| `leetcode.outputFolder` | 指定保存文件时所用的相对文件夹路径。除了用户自定义路径外，也可以使用保留项，包括：<ul><li>`${tag}`: 根据题目的类别进行分类。<li>`${language}`: 根据题目的语言进行分类。</li><li>`${difficulty}`: 根据题目的难度进行分类。</li></ul> | N/A |
+| `leetcode.outputFolder` | 指定保存文件时所用的相对文件夹路径。除了用户自定义路径外，也可以使用保留项，包括：<ul><li>`${tag}`: 根据题目的类别进行分类。<li>`${language}`: 根据题目的语言进行分类。</li><li>`${difficulty}`: 根据题目的难度进行分类。</li></ul>例如：`problem-${tag}-${difficulty}` | N/A |
 | `leetcode.enableStatusBar` | 指定是否在 VS Code 下方显示插件状态栏。 | `true` |
 | `leetcode.enableShortcuts` | 指定是否在 VS Code 编辑文件下方显示提交和测试的快捷按钮。 | `true` |
 | `leetcode.enableSideMode` | 指定在解决一道题时，是否将`问题预览`、`高票答案`与`提交结果`窗口集中在编辑器的第二栏。 | `true` |

@@ -107,14 +107,12 @@ async function showProblemInternal(node: IProblem): Promise<void> {
 const leetCodeConfig: vscode.WorkspaceConfiguration = vscode.workspace.getConfiguration("leetcode");
 let outDir: string = await selectWorkspaceFolder();
 let relativePath: string = (leetCodeConfig.get<string>("outputFolder", "")).trim();
-const matchResult: RegExpMatchArray | null = relativePath.match(/\$\{(.*?)\}/);
-if (matchResult) {
-const resolvedPath: string | undefined = await resolveRelativePath(matchResult[1].toLocaleLowerCase(), node, language);
-if (!resolvedPath) {
+if (relativePath) {
+relativePath = await resolveRelativePath(relativePath, node, language);
+if (!relativePath) {
 leetCodeChannel.appendLine("Showing problem canceled by user.");
 return;
 }
-relativePath = resolvedPath;
 }
 
 outDir = path.join(outDir, relativePath);
@@ -166,27 +164,39 @@ function parseProblemDecorator(state: ProblemState, locked: boolean): string {
 }
 }
 
-async function resolveRelativePath(value: string, node: IProblem, selectedLanguage: string): Promise<string | undefined> {
-switch (value) {
-case "tag":
-if (node.tags.length === 1) {
-return node.tags[0];
-}
-return await vscode.window.showQuickPick(
-node.tags,
-{
-matchOnDetail: true,
-placeHolder: "Multiple tags available, please select one",
-ignoreFocusOut: true,
-},
-);
-case "language":
-return selectedLanguage;
-case "difficulty":
-return node.difficulty;
-default:
-const errorMsg: string = `The config '${value}' is not supported.`;
-leetCodeChannel.appendLine(errorMsg);
-throw new Error(errorMsg);
+async function resolveRelativePath(relativePath: string, node: IProblem, selectedLanguage: string): Promise<string> {
+if (/\$\{tag\}/i.test(relativePath)) {
+const tag: string | undefined = await resolveTagForProblem(node);
+if (!tag) {
+return "";
+}
+relativePath = relativePath.replace(/\$\{tag\}/ig, tag);
 }
+
+relativePath = relativePath.replace(/\$\{language\}/ig, selectedLanguage);
+relativePath = relativePath.replace(/\$\{difficulty\}/ig, node.difficulty.toLocaleLowerCase());
+
+// Check if there is any unsupported configuration
+const matchResult: RegExpMatchArray | null = relativePath.match(/\$\{(.*?)\}/);
+if (matchResult && matchResult.length >= 1) {
+const errorMsg: string = `The config '${matchResult[1]}' is not supported.`;
+leetCodeChannel.appendLine(errorMsg);
+throw new Error(errorMsg);
+}
+
+return relativePath;
+}
+
+async function resolveTagForProblem(problem: IProblem): Promise<string | undefined> {
+if (problem.tags.length === 1) {
+return problem.tags[0];
+}
+return await vscode.window.showQuickPick(
+problem.tags,
+{
+matchOnDetail: true,
+placeHolder: "Multiple tags available, please select one",
+ignoreFocusOut: true,
+},
+);
 }