diff --git a/lua/keybindings.lua b/lua/keybindings.lua
index 6d372c0..1060ff8 100644
--- a/lua/keybindings.lua
+++ b/lua/keybindings.lua
@@ -194,8 +194,6 @@ pluginKeys.cmp = function(cmp)
             cmp.select_next_item()
         elseif vim.fn["vsnip#available"](1) == 1 then
             feedkey("<Plug>(vsnip-expand-or-jump)", "")
-        elseif has_words_before() then
-            cmp.complete()
         else
             fallback() -- The fallback function sends a already mapped key. In this case, it's probably `<Tab>`.
         end
diff --git a/lua/plugin-config/nvim-tree.lua b/lua/plugin-config/nvim-tree.lua
index 7f2fe34..647e3ea 100644
--- a/lua/plugin-config/nvim-tree.lua
+++ b/lua/plugin-config/nvim-tree.lua
@@ -11,12 +11,6 @@ nvim_tree.setup({
     git = {
         enable = false,
     },
-    -- project plugin 需要这样设置
-    update_cwd = true,
-    update_focused_file = {
-        enable = true,
-        update_cwd = true,
-    },
     -- 隐藏 .文件 和 node_modules 文件夹
     filters = {
         dotfiles = true,
diff --git a/lua/plugins.lua b/lua/plugins.lua
index 560f858..b29058e 100644
--- a/lua/plugins.lua
+++ b/lua/plugins.lua
@@ -42,9 +42,6 @@ packer.startup({
     use("hrsh7th/cmp-path") -- { name = 'path' }
     use("hrsh7th/cmp-cmdline") -- { name = 'cmdline' }
 
-    -- 常见编程语言代码段
-    use("rafamadriz/friendly-snippets")
-
     --------------------- colorschemes --------------------
     -- tokyonight
     use("folke/tokyonight.nvim")
diff --git a/test.cpp b/test.cpp
index 45d61ce..2e7d029 100644
--- a/test.cpp
+++ b/test.cpp
@@ -1,15 +1,24 @@
 #include <cstdio>
 #include <iostream>
+#include <istream>
 #include <map>
 using namespace std;
 
 
+map<int, int> mp;
+
+int tree[1000];
+void build_tree(int p, int l, int r) {
+    int mid = (l + r) >> 1;
+    build_tree(p << 1, l, mid);
+    build_tree(p<<1|1, mid+1, r);
+}
 
 int main (int argc, char *argv[])
 {
     map<int, int> mp;
     mp.size();
     mp.size();
-    
-    return 0;
+    map<int, pair<int, int>> mp2;
 }
+