diff --git a/src/admin/problem/components/AddButton.vue b/src/admin/problem/components/AddButton.vue
index c8d8ad0..b4f2151 100644
--- a/src/admin/problem/components/AddButton.vue
+++ b/src/admin/problem/components/AddButton.vue
@@ -4,6 +4,7 @@ import { addProblemForContest } from "admin/api"
 interface Props {
   problemID: number
   contestID: string
+  nextDisplayId?: string
 }
 const props = defineProps<Props>()
 const emit = defineEmits(["added"])
@@ -39,7 +40,7 @@ async function addProblem() {
     </template>
     <n-flex vertical>
       <span>请输入在这场比赛中的显示编号</span>
-      <n-input autofocus v-model:value="displayID" />
+      <n-input autofocus v-model:value="displayID" :placeholder="props.nextDisplayId ?? ''" />
     </n-flex>
   </n-popconfirm>
 </template>
diff --git a/src/admin/problem/components/Modal.vue b/src/admin/problem/components/Modal.vue
index ef16376..7475af7 100644
--- a/src/admin/problem/components/Modal.vue
+++ b/src/admin/problem/components/Modal.vue
@@ -1,12 +1,13 @@
 <script lang="ts" setup>
 import { getProblemList } from "admin/api"
 import Pagination from "shared/components/Pagination.vue"
-import { AdminProblemFiltered } from "utils/types"
+import type { AdminProblemFiltered } from "utils/types"
 import AddButton from "./AddButton.vue"
 
 interface Props {
   show: boolean
   count: number
+  nextDisplayId?: string
 }
 const props = defineProps<Props>()
 const emit = defineEmits<{
@@ -34,6 +35,7 @@ const columns: DataTableColumn<AdminProblemFiltered>[] = [
       h(AddButton, {
         problemID: row.id,
         contestID: route.params.contestID as string,
+        nextDisplayId: props.nextDisplayId,
         onAdded: () => emit("change"),
       }),
     width: 60,
@@ -53,7 +55,14 @@ watch(
   },
 )
 watch(() => [query.limit, query.page], getList)
-watchDebounced(() => query.keyword, getList, { debounce: 500, maxWait: 1000 })
+watchDebounced(
+  () => query.keyword,
+  () => {
+    query.page = 1
+    getList()
+  },
+  { debounce: 500, maxWait: 1000 },
+)
 </script>
 <template>
   <n-modal
diff --git a/src/admin/problem/list.vue b/src/admin/problem/list.vue
index 3668b4d..4dac230 100644
--- a/src/admin/problem/list.vue
+++ b/src/admin/problem/list.vue
@@ -34,6 +34,15 @@ const { count, inc } = useCounter(0)
 const total = ref(0)
 const problems = ref<AdminProblemFiltered[]>([])
 
+const nextDisplayID = computed(() => {
+  if (!isContestProblemList.value || problems.value.length === 0) return ""
+  const ids = problems.value.map((p) => p._id)
+  if (ids.every((id) => /^\d+$/.test(id))) {
+    return String(Math.max(...ids.map((id) => parseInt(id))) + 1)
+  }
+  return ""
+})
+
 interface ProblemQuery {
   keyword: string
   author: string
@@ -184,7 +193,7 @@ watch(() => [query.page, query.limit, query.author], listProblems)
     v-model:limit="query.limit"
     v-model:page="query.page"
   />
-  <Modal v-model:show="show" :count="count" @change="listProblems" />
+  <Modal v-model:show="show" :count="count" :next-display-id="nextDisplayID" @change="listProblems" />
 </template>
 
 <style scoped>