diff --git a/.vscode/c.code-snippets b/.vscode/c.code-snippets
index 0746260..72229a3 100644
--- a/.vscode/c.code-snippets
+++ b/.vscode/c.code-snippets
@@ -54,18 +54,6 @@
     ],
     "description": "Define for i"
   },
-  "Define var swapper": {
-    "prefix": "fn_define_swapper",
-    "body": [
-      "#define DEFINE_SWAPPER(type)                                                    \\",
-      "    void swap_##type(type *a, type *b) {                                              \\",
-      "        type t = *a;                                                           \\",
-      "        *a = *b;                                                               \\",
-      "        *b = t;                                                                \\",
-      "    }"
-    ],
-    "description": "Define var swapper"
-  },
   "Define function put bool": {
     "prefix": "fn_putbool",
     "body": ["#define putbool(x) (printf(\"%s\", (x) ? \"TRUE\" : \"FALSE\"))"],
@@ -81,9 +69,15 @@
     "body": ["#define min(i, j) (((i) < (j)) ? (i) : (j))"],
     "description": "Define function min"
   },
-  "Define Boolean": {
-    "prefix": "define_boolean",
-    "body": ["#define bool int", "#define true 1", "#define false 0"],
-    "description": "Define Boolean"
+  "Define bool": {
+    "prefix": "define_bool",
+    "body": [
+      "#ifndef bool",
+      "#define bool int",
+      "#define true 1",
+      "#define false 0",
+      "#endif"
+    ],
+    "description": "Define bool"
   }
 }
diff --git a/.vscode/c.template.code-snippets b/.vscode/c.template.code-snippets
index c1b381d..ebb1a84 100644
--- a/.vscode/c.template.code-snippets
+++ b/.vscode/c.template.code-snippets
@@ -12,6 +12,21 @@
     ],
     "description": "Define template"
   },
+  "Define swap": {
+  "prefix": "define_swap",
+  "body": [
+    "#define T_swap__(size, a, b)                                                   \\",
+    "    {                                                                          \\",
+    "        void *INBLOCK_TMP = malloc(size);                                      \\",
+    "        memcpy(INBLOCK_TMP, a, size);                                          \\",
+    "        memcpy(a, b, size);                                                    \\",
+    "        memcpy(b, INBLOCK_TMP, size);                                          \\",
+    "        free(INBLOCK_TMP);                                                     \\",
+    "    }",
+    "#define T_swap(T) T_swap__"
+  ],
+  "description": "Define swap"
+},
   "Define sort": {
     "prefix": "define_sort",
     "body": [
diff --git a/0401-t/1.c b/0401-t/1.c
new file mode 100644
index 0000000..a1ac608
--- /dev/null
+++ b/0401-t/1.c
@@ -0,0 +1,21 @@
+#include <stdio.h>
+
+int main() {
+    int n, m, a[101], i, j, num[101] = {0}, ans = 1;
+    scanf("%d", &n);
+    for (i = 1; i <= n; i++)
+        scanf("%d", &a[i]);
+    scanf("%d", &m);
+    for (i = 1; i <= n; i++) {
+        if (m < a[i]) {
+            if (num[a[i]])
+                continue;
+            else {
+                ans++;
+                num[a[i]]++;
+            }
+        }
+    }
+    printf("%d", ans);
+    return 0;
+}
\ No newline at end of file