diff --git a/.vscode/c_cpp_properties.json b/.vscode/c_cpp_properties.json
new file mode 100644
index 0000000..4039bef
--- /dev/null
+++ b/.vscode/c_cpp_properties.json
@@ -0,0 +1,16 @@
+{
+    "configurations": [
+        {
+            "name": "Linux",
+            "includePath": [
+                "${workspaceFolder}/**"
+            ],
+            "defines": [],
+            "compilerPath": "/usr/bin/gcc",
+            "cStandard": "c17",
+            "cppStandard": "gnu++17",
+            "intelliSenseMode": "linux-gcc-x64"
+        }
+    ],
+    "version": 4
+}
\ No newline at end of file
diff --git a/.vscode/launch.json b/.vscode/launch.json
new file mode 100644
index 0000000..1a1b0f5
--- /dev/null
+++ b/.vscode/launch.json
@@ -0,0 +1,161 @@
+{
+  "configurations": [
+    {
+      "name": "C/C++: g++-11 生成和调试活动文件",
+      "type": "cppdbg",
+      "request": "launch",
+      "program": "${fileDirname}/${fileBasenameNoExtension}",
+      "args": [],
+      "stopAtEntry": false,
+      "cwd": "${fileDirname}",
+      "environment": [],
+      "externalConsole": false,
+      "MIMode": "gdb",
+      "setupCommands": [
+        {
+          "description": "为 gdb 启用整齐打印",
+          "text": "-enable-pretty-printing",
+          "ignoreFailures": true
+        },
+        {
+          "description": "将反汇编风格设置为 Intel",
+          "text": "-gdb-set disassembly-flavor intel",
+          "ignoreFailures": true
+        }
+      ],
+      "preLaunchTask": "C/C++: g++-11 生成活动文件",
+      "miDebuggerPath": "/usr/bin/gdb"
+    },
+    {
+      "name": "C/C++: cpp 生成和调试活动文件",
+      "type": "cppdbg",
+      "request": "launch",
+      "program": "${fileDirname}/${fileBasenameNoExtension}",
+      "args": [],
+      "stopAtEntry": false,
+      "cwd": "${fileDirname}",
+      "environment": [],
+      "externalConsole": false,
+      "MIMode": "gdb",
+      "setupCommands": [
+        {
+          "description": "为 gdb 启用整齐打印",
+          "text": "-enable-pretty-printing",
+          "ignoreFailures": true
+        },
+        {
+          "description": "将反汇编风格设置为 Intel",
+          "text": "-gdb-set disassembly-flavor intel",
+          "ignoreFailures": true
+        }
+      ],
+      "preLaunchTask": "C/C++: cpp 生成活动文件",
+      "miDebuggerPath": "/usr/bin/gdb"
+    },
+    {
+      "name": "C/C++: g++ 生成和调试活动文件",
+      "type": "cppdbg",
+      "request": "launch",
+      "program": "${fileDirname}/${fileBasenameNoExtension}",
+      "args": [],
+      "stopAtEntry": false,
+      "cwd": "${fileDirname}",
+      "environment": [],
+      "externalConsole": false,
+      "MIMode": "gdb",
+      "setupCommands": [
+        {
+          "description": "为 gdb 启用整齐打印",
+          "text": "-enable-pretty-printing",
+          "ignoreFailures": true
+        },
+        {
+          "description": "将反汇编风格设置为 Intel",
+          "text": "-gdb-set disassembly-flavor intel",
+          "ignoreFailures": true
+        }
+      ],
+      "preLaunchTask": "C/C++: g++ 生成活动文件",
+      "miDebuggerPath": "/usr/bin/gdb"
+    },
+    {
+      "name": "C/C++: g++-11 生成和调试活动文件",
+      "type": "cppdbg",
+      "request": "launch",
+      "program": "${fileDirname}/${fileBasenameNoExtension}",
+      "args": [],
+      "stopAtEntry": false,
+      "cwd": "${fileDirname}",
+      "environment": [],
+      "externalConsole": false,
+      "MIMode": "gdb",
+      "setupCommands": [
+        {
+          "description": "为 gdb 启用整齐打印",
+          "text": "-enable-pretty-printing",
+          "ignoreFailures": true
+        },
+        {
+          "description": "将反汇编风格设置为 Intel",
+          "text": "-gdb-set disassembly-flavor intel",
+          "ignoreFailures": true
+        }
+      ],
+      "preLaunchTask": "C/C++: g++-11 生成活动文件",
+      "miDebuggerPath": "/usr/bin/gdb"
+    },
+    {
+      "name": "C/C++: g++ 生成和调试活动文件",
+      "type": "cppdbg",
+      "request": "launch",
+      "program": "${fileDirname}/${fileBasenameNoExtension}",
+      "args": [],
+      "stopAtEntry": false,
+      "cwd": "${fileDirname}",
+      "environment": [],
+      "externalConsole": false,
+      "MIMode": "gdb",
+      "setupCommands": [
+        {
+          "description": "为 gdb 启用整齐打印",
+          "text": "-enable-pretty-printing",
+          "ignoreFailures": true
+        },
+        {
+          "description": "将反汇编风格设置为 Intel",
+          "text": "-gdb-set disassembly-flavor intel",
+          "ignoreFailures": true
+        }
+      ],
+      "preLaunchTask": "C/C++: g++ 生成活动文件",
+      "miDebuggerPath": "/usr/bin/gdb"
+    },
+    {
+      "name": "C/C++: gcc 生成和调试活动文件",
+      "type": "cppdbg",
+      "request": "launch",
+      "program": "${fileDirname}/${fileBasenameNoExtension}",
+      "args": [],
+      "stopAtEntry": false,
+      "cwd": "${fileDirname}",
+      "environment": [],
+      "externalConsole": false,
+      "MIMode": "gdb",
+      "setupCommands": [
+        {
+          "description": "为 gdb 启用整齐打印",
+          "text": "-enable-pretty-printing",
+          "ignoreFailures": true
+        },
+        {
+          "description": "将反汇编风格设置为 Intel",
+          "text": "-gdb-set disassembly-flavor intel",
+          "ignoreFailures": true
+        }
+      ],
+      "preLaunchTask": "C/C++: gcc 生成活动文件",
+      "miDebuggerPath": "/usr/bin/gdb"
+    }
+  ],
+  "version": "2.0.0"
+}
\ No newline at end of file
diff --git a/.vscode/settings.json b/.vscode/settings.json
new file mode 100644
index 0000000..e99284c
--- /dev/null
+++ b/.vscode/settings.json
@@ -0,0 +1,52 @@
+{
+  "code-runner.executorMap": {
+    "cpp": "cd $dir && g++ -std=c++17 $fileName -o $fileNameWithoutExt && $dir$fileNameWithoutExt",
+    },
+  "files.associations": {
+    "array": "cpp",
+    "atomic": "cpp",
+    "bit": "cpp",
+    "*.tcc": "cpp",
+    "cctype": "cpp",
+    "clocale": "cpp",
+    "cmath": "cpp",
+    "compare": "cpp",
+    "concepts": "cpp",
+    "cstdarg": "cpp",
+    "cstddef": "cpp",
+    "cstdint": "cpp",
+    "cstdio": "cpp",
+    "cstdlib": "cpp",
+    "cwchar": "cpp",
+    "cwctype": "cpp",
+    "deque": "cpp",
+    "string": "cpp",
+    "unordered_map": "cpp",
+    "vector": "cpp",
+    "exception": "cpp",
+    "algorithm": "cpp",
+    "functional": "cpp",
+    "iterator": "cpp",
+    "memory": "cpp",
+    "memory_resource": "cpp",
+    "numeric": "cpp",
+    "random": "cpp",
+    "string_view": "cpp",
+    "system_error": "cpp",
+    "tuple": "cpp",
+    "type_traits": "cpp",
+    "utility": "cpp",
+    "initializer_list": "cpp",
+    "iosfwd": "cpp",
+    "iostream": "cpp",
+    "istream": "cpp",
+    "limits": "cpp",
+    "new": "cpp",
+    "numbers": "cpp",
+    "ostream": "cpp",
+    "stdexcept": "cpp",
+    "streambuf": "cpp",
+    "typeinfo": "cpp",
+    "variant": "cpp"
+  }
+}
\ No newline at end of file
diff --git a/.vscode/tasks.json b/.vscode/tasks.json
new file mode 100644
index 0000000..cabe39b
--- /dev/null
+++ b/.vscode/tasks.json
@@ -0,0 +1,89 @@
+{
+  "tasks": [
+    
+    {
+      "type": "cppbuild",
+      "label": "C/C++: g++ 生成活动文件",
+      "command": "/usr/bin/g++",
+      "args": [
+        "-fdiagnostics-color=always",
+        "-g",
+        "${file}",
+        "-o",
+        "${fileDirname}/${fileBasenameNoExtension}",
+      ],
+      "options": {
+        "cwd": "${fileDirname}"
+      },
+      "problemMatcher": [
+        "$gcc"
+      ],
+      "group": {
+        "kind": "build",
+        "isDefault": true
+      },
+      "detail": "调试器生成的任务。"
+    },
+    {
+      "type": "cppbuild",
+      "label": "C/C++: g++-11 生成活动文件",
+      "command": "/usr/bin/g++-11",
+      "args": [
+        "-fdiagnostics-color=always",
+        "-g",
+        "${file}",
+        "-o",
+        "${fileDirname}/${fileBasenameNoExtension}",
+      ],
+      "options": {
+        "cwd": "${fileDirname}"
+      },
+      "problemMatcher": [
+        "$gcc"
+      ],
+      "group": "build",
+      "detail": "调试器生成的任务。"
+    },
+    {
+      "type": "cppbuild",
+      "label": "C/C++: cpp 生成活动文件",
+      "command": "/usr/bin/cpp",
+      "args": [
+        "-fdiagnostics-color=always",
+        "-g",
+        "${file}",
+        "-o",
+        "${fileDirname}/${fileBasenameNoExtension}"
+      ],
+      "options": {
+        "cwd": "${fileDirname}"
+      },
+      "problemMatcher": [
+        "$gcc"
+      ],
+      "group": "build",
+      "detail": "调试器生成的任务。"
+    },
+    {
+      "type": "cppbuild",
+      "label": "C/C++: gcc 生成活动文件",
+      "command": "/usr/bin/gcc",
+      "args": [
+        "-fdiagnostics-color=always",
+        "-g",
+        "${file}",
+        "-o",
+        "${fileDirname}/${fileBasenameNoExtension}"
+      ],
+      "options": {
+        "cwd": "${fileDirname}"
+      },
+      "problemMatcher": [
+        "$gcc"
+      ],
+      "group": "build",
+      "detail": "调试器生成的任务。"
+    }
+  ],
+  "version": "2.0.0"
+}
\ No newline at end of file
diff --git a/main.cpp b/main.cpp
index d76cce7..37ae7dc 100644
--- a/main.cpp
+++ b/main.cpp
@@ -3,6 +3,7 @@
 #include <variant>
 
 // 请修复这个函数的定义：10 分
+template<class T>
 std::ostream &operator<<(std::ostream &os, std::vector<T> const &a) {
     os << "{";
     for (size_t i = 0; i < a.size(); i++) {
@@ -16,19 +17,42 @@ std::ostream &operator<<(std::ostream &os, std::vector<T> const &a) {
 
 // 请修复这个函数的定义：10 分
 template <class T1, class T2>
-std::vector<T0> operator+(std::vector<T1> const &a, std::vector<T2> const &b) {
+auto operator+(std::vector<T1> const &a, std::vector<T2> const &b) {
     // 请实现列表的逐元素加法！10 分
     // 例如 {1, 2} + {3, 4} = {4, 6}
+    using T0 = decltype(T1{} + T2{});
+    size_t imin = std::min(a.size(), b.size());
+    std::vector<T0> ret;
+    for(size_t i = 0; i < imin; ++i){
+        ret.push_back(a[i] + b[i]);
+    }
+    return ret;
+    
 }
 
 template <class T1, class T2>
 std::variant<T1, T2> operator+(std::variant<T1, T2> const &a, std::variant<T1, T2> const &b) {
     // 请实现自动匹配容器中具体类型的加法！10 分
+    std::variant<T1, T2> res;
+    std::visit([&] (const auto &t1, const auto &t2){
+        res = t1 + t2;
+    }, a, b);
+    return res;
 }
 
 template <class T1, class T2>
 std::ostream &operator<<(std::ostream &os, std::variant<T1, T2> const &a) {
     // 请实现自动匹配容器中具体类型的打印！10 分
+    // if(a.index==0){
+    //     os << std::get<0>(v) << std::endl;
+    // }else if(a.index==1){
+    //     os << std::get<1>(v) << std::endl;
+    // }
+    // return os;
+    std::visit([&] (const auto t){
+        os << t << std::endl;
+    }, a);
+    return os;
 }
 
 int main() {