diff --git a/include/solution/1233.h b/include/solution/1233.h
new file mode 100644
index 0000000..0f9a029
--- /dev/null
+++ b/include/solution/1233.h
@@ -0,0 +1,11 @@
+#ifndef INC_1233_H
+#define INC_1233_H
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+    char **removeSubfolders(char **folder, int folderSize, int *returnSize);
+#ifdef __cplusplus
+}
+#endif
+#endif
diff --git a/src/1233.c b/src/1233.c
new file mode 100644
index 0000000..54668a7
--- /dev/null
+++ b/src/1233.c
@@ -0,0 +1,30 @@
+#include <solution/1233.h>
+#include <stdbool.h>
+#include <stdlib.h>
+
+bool startwith(char *p, char *s)
+{
+    for (; *p && *s; p++, s++)
+        if (*p != *s)
+            return false;
+
+    return (!*p && *s) || (!*p && !*s);
+}
+
+char **removeSubfolders(char **folder, int folderSize, int *returnSize)
+{
+    char **ret = malloc(sizeof(char *));
+    *returnSize = 1;
+
+    ret[0] = folder[0];
+    for (int i = 1; i < folderSize; i++)
+    {
+        if (startwith(ret[*(returnSize)-1], folder[i]))
+            continue;
+
+        ret = realloc(ret, sizeof(char *) * ++(*returnSize));
+        ret[*returnSize - 1] = folder[i];
+    }
+
+    return ret;
+}
\ No newline at end of file
diff --git a/tests/test_1233.cpp b/tests/test_1233.cpp
new file mode 100644
index 0000000..9a8d1bb
--- /dev/null
+++ b/tests/test_1233.cpp
@@ -0,0 +1,52 @@
+#include <algorithm>
+#include <gtest/gtest.h>
+#include <solution/1233.h>
+#include <string>
+#include <vector>
+
+bool ArrayEquals(char **actual, int actualSize, const std::vector<std::string> &expected)
+{
+    if (actualSize != expected.size())
+        return false;
+
+    std::vector<std::string> actualVec(actual, actual + actualSize);
+    return std::is_permutation(actualVec.begin(), actualVec.end(), expected.begin());
+}
+
+// 测试类
+class RemoveSubfoldersTest : public ::testing::Test
+{
+  protected:
+    void AssertFolders(std::vector<std::string> input, std::vector<std::string> expected)
+    {
+        int returnSize = 0;
+        std::vector<char *> c_input;
+        for (auto &s : input)
+            c_input.push_back(const_cast<char *>(s.c_str()));
+
+        char **result = removeSubfolders(c_input.data(), (int)c_input.size(), &returnSize);
+        ASSERT_TRUE(ArrayEquals(result, returnSize, expected));
+
+        // 可选释放 result 内存，如果实现中是动态分配的（free）
+        // 例如：for (int i = 0; i < returnSize; ++i) free(result[i]);
+        // free(result);
+    }
+};
+
+// 示例 1
+TEST_F(RemoveSubfoldersTest, Example1)
+{
+    AssertFolders({"/a", "/a/b", "/c/d", "/c/d/e", "/c/f"}, {"/a", "/c/d", "/c/f"});
+}
+
+// 示例 2
+TEST_F(RemoveSubfoldersTest, Example2)
+{
+    AssertFolders({"/a", "/a/b/c", "/a/b/d"}, {"/a"});
+}
+
+// 示例 3
+TEST_F(RemoveSubfoldersTest, Example3)
+{
+    AssertFolders({"/a/b/c", "/a/b/ca", "/a/b/d"}, {"/a/b/c", "/a/b/ca", "/a/b/d"});
+}
\ No newline at end of file