diff --git a/.clang-format b/.clang-format
new file mode 100644
index 0000000..1516991
--- /dev/null
+++ b/.clang-format
@@ -0,0 +1,2 @@
+BasedOnStyle: Google
+ColumnLimit: 90
diff --git a/.clang-format-ignore b/.clang-format-ignore
new file mode 100644
index 0000000..f3e13d6
--- /dev/null
+++ b/.clang-format-ignore
@@ -0,0 +1,15 @@
+# dependencies
+node_modules
+
+# production
+build
+.next
+
+# env
+.env
+.env.development
+.env.production
+
+# tests
+.nyc_output
+coverage
diff --git a/.prettierignore b/.prettierignore
index 76ef5c8..c83e239 100644
--- a/.prettierignore
+++ b/.prettierignore
@@ -19,3 +19,7 @@ package-lock.json
 
 # markdown
 *.md
+
+# cpp
+*.c
+*.cpp
diff --git a/.vscode/settings.json b/.vscode/settings.json
index 5c662ff..d4c380d 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -2,10 +2,14 @@
   "editor.formatOnSave": true,
   "editor.formatOnPaste": true,
   "editor.defaultFormatter": "esbenp.prettier-vscode",
+  "[c][cpp]": {
+    "editor.defaultFormatter": "ms-vscode.cpptools"
+  },
   "editor.codeActionsOnSave": {
     "source.fixAll.eslint": "always",
     "source.fixAll.stylelint": "always",
     "source.fixAll.markdownlint": "always"
   },
-  "stylelint.validate": ["css", "scss"]
+  "stylelint.validate": ["css", "scss"],
+  "C_Cpp.clang_format_fallbackStyle": "Google"
 }
diff --git a/package-lock.json b/package-lock.json
index ae9a1cd..a45a33f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,5 +1,5 @@
 {
-  "name": "web-blog",
+  "name": "web-blog.lumir.page",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
@@ -13,6 +13,7 @@
         "react-dom": "^18.3.1"
       },
       "devDependencies": {
+        "clang-format-node": "^1.0.2",
         "concurrently": "^8.2.2",
         "editorconfig-checker": "^5.1.8",
         "eslint": "^8.57.0",
@@ -1956,6 +1957,17 @@
         "node": ">= 6"
       }
     },
+    "node_modules/clang-format-node": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/clang-format-node/-/clang-format-node-1.0.2.tgz",
+      "integrity": "sha512-wi2qBA5Ixk75PpUIpRMZS1k84IOKu339Fai86yG6CjIzHndUyrdhCRB1cOTyDHmcXIW5BOzLGljqskEOjv0USw==",
+      "dev": true,
+      "hasInstallScript": true,
+      "license": "MIT",
+      "bin": {
+        "clang-format": "build/index.js"
+      }
+    },
     "node_modules/cli-cursor": {
       "version": "5.0.0",
       "resolved": "https://registry.npmjs.org/cli-cursor/-/cli-cursor-5.0.0.tgz",
diff --git a/package.json b/package.json
index 9786478..f0b1688 100644
--- a/package.json
+++ b/package.json
@@ -12,10 +12,12 @@
     "lint-editorconfig": "npx editorconfig-checker",
     "lint-markdownlint": "npx markdownlint **/*.md",
     "lint-textlint": "npx textlint -f pretty-error src/docs",
+    "lint-clangformat": "find . -name '*.c' -o -name '*.cpp' -print0 | xargs -0 npx clang-format -n -Werror",
     "fix": "concurrently \"npm:fix-*\"",
     "fix-eslint": "npx eslint . --fix --ext .js,.jsx",
     "fix-stylelint": "npx stylelint --fix **/*.{css,scss}",
     "fix-prettier": "npx prettier . --write",
+    "fix-clangformat": "find . -name '*.c' -o -name '*.cpp' -print0 | xargs -0 npx clang-format -i",
     "count-docs": "ls -R src/docs | grep .md | wc -l"
   },
   "dependencies": {
@@ -27,6 +29,7 @@
     "react-dom": "^18.3.1"
   },
   "devDependencies": {
+    "clang-format-node": "^1.0.2",
     "concurrently": "^8.2.2",
     "editorconfig-checker": "^5.1.8",
     "eslint": "^8.57.0",
@@ -51,6 +54,7 @@
     "*.{js,jsx}": "npx eslint",
     "*.{css,scss}": "npx stylelint",
     "*.md": "npx markdownlint",
-    "src/docs/**/*.md": "npx textlint -f pretty-error"
+    "src/docs/**/*.md": "npx textlint -f pretty-error",
+    "*.{c,cpp}": "npx clang-format -n -Werror"
   }
 }
diff --git a/public/code/ps/baekjoon/2558.c b/public/code/ps/baekjoon/2558.c
new file mode 100644
index 0000000..c659a95
--- /dev/null
+++ b/public/code/ps/baekjoon/2558.c
@@ -0,0 +1,10 @@
+#include <stdio.h>
+
+int main(int argc, char* argv[]) {
+  int a = 0, b = 0;
+
+  scanf("%d %d", &a, &b);
+  printf("%d", a + b);
+
+  return 0;
+}