diff --git a/11A18633/main.go b/11A18633/main.go
new file mode 100644
index 0000000..590361a
--- /dev/null
+++ b/11A18633/main.go
@@ -0,0 +1,87 @@
+package main
+
+import (
+	"net/http"
+	"strconv"
+
+	"github.com/gin-gonic/gin"
+)
+
+type TODO struct {
+	Content string `json:"content"`
+	Done    bool   `json:"done"`
+}
+
+var todos []TODO
+
+type Response struct {
+	Status string      `json:"status"`
+	Data   interface{} `json:"data"`
+}
+
+func main() {
+	r := gin.Default()
+
+	// 添加TODO
+	r.POST("/todo", func(c *gin.Context) {
+		var todo TODO
+		if err := c.ShouldBindJSON(&todo); err != nil {
+			c.JSON(http.StatusBadRequest, Response{Status: "error", Data: err.Error()})
+			return
+		}
+		todos = append(todos, todo)
+		c.JSON(http.StatusOK, Response{Status: "ok"})
+	})
+
+	// 删除TODO
+	r.DELETE("/todo/:index", func(c *gin.Context) {
+		index, err := strconv.Atoi(c.Param("index"))
+		if err != nil {
+			c.JSON(http.StatusBadRequest, Response{Status: "error", Data: err.Error()})
+			return
+		}
+		if index < 0 || index >= len(todos) {
+			c.JSON(http.StatusBadRequest, Response{Status: "error", Data: "index out of range"})
+			return
+		}
+		todos = append(todos[:index], todos[index+1:]...)
+		c.JSON(http.StatusOK, Response{Status: "ok"})
+	})
+
+	// 修改TODO
+	r.PUT("/todo/:index", func(c *gin.Context) {
+		index, err := strconv.Atoi(c.Param("index"))
+		if err != nil {
+			c.JSON(http.StatusBadRequest, Response{Status: "error", Data: err.Error()})
+			return
+		}
+		var todo TODO
+		if err := c.ShouldBindJSON(&todo); err != nil {
+			c.JSON(http.StatusBadRequest, Response{Status: "error", Data: err.Error()})
+			return
+		}
+		todos[index] = todo
+		c.JSON(http.StatusOK, Response{Status: "ok"})
+	})
+
+	// 获取TODO列表
+	r.GET("/todo", func(c *gin.Context) {
+		c.JSON(http.StatusOK, todos)
+	})
+
+	// 获取TODO详情
+	r.GET("/todo/:index", func(c *gin.Context) {
+		index, err := strconv.Atoi(c.Param("index"))
+		if err != nil {
+			c.JSON(http.StatusBadRequest, Response{Status: "error", Data: err.Error()})
+			return
+		}
+		if index < 0 || index >= len(todos) {
+			c.JSON(http.StatusBadRequest, Response{Status: "error", Data: "index out of range"})
+			return
+		}
+		c.JSON(http.StatusOK, todos[index])
+	})
+
+	r.Run(":8080")
+}