diff --git a/apps/api/src/routes/admin/problem.ts b/apps/api/src/routes/admin/problem.ts
index 18f408b..3939b05 100644
--- a/apps/api/src/routes/admin/problem.ts
+++ b/apps/api/src/routes/admin/problem.ts
@@ -50,6 +50,7 @@ import { config } from "../../config"
 import { readFile } from "node:fs/promises"
 import { resolve } from "node:path"
 import { getTopReactions } from "../../services/reaction"
+import { problemUserCounts } from "../../services/problem-progress"
 import { asRecord, queryInteger, sampleUser } from "../helpers"
 
 export const adminProblemRoutes = new Hono<AppEnv>()
@@ -447,8 +448,13 @@ adminProblemRoutes.get("/problems", requireProblemPermission, async (c) => {
       ),
     )
   }
+  // 「全部 / 学生看得到 / 藏着的」：三个按钮上的数按除可见性以外的条件数，列表再按它筛
+  const beforeVisible = and(...filters)
+  const visibleQuery = c.req.query("visible")
+  if (visibleQuery === "1") filters.push(eq(schema.problem.visible, true))
+  else if (visibleQuery === "0") filters.push(eq(schema.problem.visible, false))
   const where = and(...filters)
-  const [totalRow, rows] = await Promise.all([
+  const [totalRow, rows, visibleRows] = await Promise.all([
     db
       .select({ value: count() })
       .from(schema.problem)
@@ -467,13 +473,24 @@ adminProblemRoutes.get("/problems", requireProblemPermission, async (c) => {
       .orderBy(desc(schema.problem.createTime))
       .limit(limit)
       .offset(offset),
+    library
+      ? []
+      : db
+          .select({ visible: schema.problem.visible, value: count() })
+          .from(schema.problem)
+          .innerJoin(schema.user, eq(schema.problem.createdById, schema.user.id))
+          .where(beforeVisible)
+          .groupBy(schema.problem.visible),
   ])
   // 只有公开题列表下发最高票评价，比赛题列表不下发 —— 与旧后端一致
   const problemIds = rows.map(({ problem }) => problem.id)
-  const [topReactions, tags] = await Promise.all([
+  const [topReactions, tags, userCounts] = await Promise.all([
     getTopReactions(problemIds),
     tagNamesFor(problemIds),
+    problemUserCounts(problemIds),
   ])
+  const visibleCount = visibleRows.find((row) => row.visible)?.value ?? 0
+  const hiddenCount = visibleRows.find((row) => !row.visible)?.value ?? 0
   return success(c, {
     results: rows.map(
       ({ problem, user: creator, realName }) =>
@@ -491,9 +508,14 @@ adminProblemRoutes.get("/problems", requireProblemPermission, async (c) => {
           allowFlowchart: problem.allowFlowchart,
           showFlowchart: problem.showFlowchart,
           topReaction: topReactions.get(problem.id) ?? null,
+          solvedUsers: userCounts.get(problem.id)?.solved ?? 0,
+          triedUsers: userCounts.get(problem.id)?.tried ?? 0,
         }) satisfies AdminProblemListItem,
     ),
     total: totalRow[0]?.value ?? 0,
+    counts: library
+      ? undefined
+      : { all: visibleCount + hiddenCount, visible: visibleCount, hidden: hiddenCount },
   } satisfies AdminProblemList)
 })
 
@@ -637,7 +659,15 @@ adminProblemRoutes.get("/contests/:contestId/problems", requireProblemPermission
   const offset = queryInteger(c.req.query("offset"), 0, { min: 0 })
   const filters = [eq(schema.problem.contestId, contestId)]
   const keyword = c.req.query("keyword")?.trim()
-  if (keyword) filters.push(ilike(schema.problem.title, `%${keyword}%`))
+  // 和公开题列表一样，题号也能搜（搜索框写的是「题号或题目名」）
+  if (keyword) {
+    filters.push(
+      or(
+        ilike(schema.problem.title, `%${keyword}%`),
+        ilike(schema.problem.displayId, `%${keyword}%`),
+      )!,
+    )
+  }
   const where = and(...filters)
   const [totalRow, rows] = await Promise.all([
     db.select({ value: count() }).from(schema.problem).where(where),
@@ -673,6 +703,8 @@ adminProblemRoutes.get("/contests/:contestId/problems", requireProblemPermission
           allowFlowchart: problem.allowFlowchart,
           showFlowchart: problem.showFlowchart,
           topReaction: null,
+          solvedUsers: 0,
+          triedUsers: 0,
         }) satisfies AdminProblemListItem,
     ),
     total: totalRow[0]?.value ?? 0,
diff --git a/apps/api/src/routes/admin/tag.ts b/apps/api/src/routes/admin/tag.ts
index 068bee1..9389aad 100644
--- a/apps/api/src/routes/admin/tag.ts
+++ b/apps/api/src/routes/admin/tag.ts
@@ -1,6 +1,7 @@
 import {
   parseFlowDoc,
   batchProblemTagRequestSchema,
+  batchProblemVisibleRequestSchema,
   generateFlowchartRequestSchema,
   renameTagRequestSchema,
   setTagCategoryRequestSchema,
@@ -253,6 +254,28 @@ adminTagRoutes.put("/problems/:id/visibility", requireProblemPermission, async (
   return success(c, { visible: !problem.visible })
 })
 
+/**
+ * 勾了几道，一次让学生看得到 / 藏起来（后台题目列表「已选 N 道」那一条）。
+ * 和批量加标签同一个范围：只认公开题，不是全部题目管理员就只认自己出的
+ */
+adminTagRoutes.post("/problems/batch-visible", requireProblemPermission, async (c) => {
+  const parsed = await parseBody(c, batchProblemVisibleRequestSchema)
+  if (!parsed.success) return parsed.response
+  const user = c.get("user")!
+  const filters = [
+    inArray(schema.problem.id, parsed.data.problemIds),
+    isNull(schema.problem.contestId),
+  ]
+  if (!canManageAllProblems(user)) filters.push(eq(schema.problem.createdById, user.id))
+  const updated = await db
+    .update(schema.problem)
+    .set({ visible: parsed.data.visible })
+    .where(and(...filters))
+    .returning({ id: schema.problem.id })
+  if (updated.length === 0) return failure(c, 404, "no-problems", "没有可操作的题目")
+  return success(c, { problemCount: updated.length })
+})
+
 // ---------------------------------------------------------------- Python → 流程图
 
 /**
diff --git a/packages/contract/src/admin.ts b/packages/contract/src/admin.ts
index d8cd2e5..2ec8d10 100644
--- a/packages/contract/src/admin.ts
+++ b/packages/contract/src/admin.ts
@@ -529,6 +529,12 @@ export const batchProblemTagRequestSchema = z.object({
   action: z.enum(["add", "remove"]),
 })
 
+/** 勾了几道题，一次让学生看得到 / 藏起来。只认公开题、只认自己能改的 */
+export const batchProblemVisibleRequestSchema = z.object({
+  problemIds: z.array(z.number().int().positive()).min(1),
+  visible: z.boolean(),
+})
+
 export const batchProblemTagResponseSchema = z.object({
   problemCount: z.number().int(),
   tagCount: z.number().int(),
@@ -699,9 +705,23 @@ export const adminProblemListItemSchema = z.object({
   // 最高票评价 {type, count}。**只有公开题列表下发**，比赛题列表恒传 null ——
   // 与旧后端 reaction/services.py:get_top_reactions 的口径一致。
   topReaction: z.object({ type: reactionKeySchema, count: z.number().int() }).nullable(),
+  /**
+   * 做对 / 做过的人数（代码提交，和前台题目列表同一口径）。比赛题列表恒为 0 ——
+   * 那个口径只数题库里交的。做过的人数 > 0 就删不掉（有提交），列表里「删除」据此灰掉
+   */
+  solvedUsers: z.number().int(),
+  triedUsers: z.number().int(),
 })
 
-export const adminProblemListSchema = paginatedSchema(adminProblemListItemSchema)
+export const adminProblemListSchema = paginatedSchema(adminProblemListItemSchema).extend({
+  /**
+   * 「全部 / 学生看得到 / 藏着的」三个按钮上的数：除了可见性，筛选条件和列表一样。
+   * 只有公开题列表给，比赛题列表没有这组按钮
+   */
+  counts: z
+    .object({ all: z.number().int(), visible: z.number().int(), hidden: z.number().int() })
+    .optional(),
+})
 
 /**
  * 题面样例 / 标准答案 / 测试点分值。这三个旧后端都是逐字段校验的
@@ -1058,6 +1078,7 @@ export type CreateProblemSetBadgeRequest = z.infer<typeof createProblemSetBadgeR
 export type UpdateProblemSetBadgeRequest = z.infer<typeof updateProblemSetBadgeRequestSchema>
 export type RenameTagRequest = z.infer<typeof renameTagRequestSchema>
 export type BatchProblemTagRequest = z.infer<typeof batchProblemTagRequestSchema>
+export type BatchProblemVisibleRequest = z.infer<typeof batchProblemVisibleRequestSchema>
 export type GenerateFlowchartRequest = z.infer<typeof generateFlowchartRequestSchema>
 export type GenerateFlowchartResponse = z.infer<typeof generateFlowchartResponseSchema>
 export type UpdateProblemRequest = z.infer<typeof updateProblemRequestSchema>