From 86a61ddaf69829cb22028efed56e6e26e389ab2a Mon Sep 17 00:00:00 2001
From: Ren Baoshuo <i@baoshuo.ren>
Date: Mon, 16 Nov 2020 18:42:08 +0800
Subject: [PATCH] =?UTF-8?q?P3871=20[TJOI2010]=E4=B8=AD=E4=BD=8D=E6=95=B0?=
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R42008699
---
 problem/P3871/P3871.cpp | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)
 create mode 100644 problem/P3871/P3871.cpp

diff --git a/problem/P3871/P3871.cpp b/problem/P3871/P3871.cpp
new file mode 100644
index 00000000..bc24c7e9
--- /dev/null
+++ b/problem/P3871/P3871.cpp
@@ -0,0 +1,26 @@
+#include<bits/stdc++.h>
+
+using namespace std;
+
+int main() {
+    int n,m, t;
+    string op;
+    vector<int> nums;
+    cin >> n;
+    for(int i = 0 ; i < n ; i++) {
+        cin >> t;
+        nums.insert(lower_bound(nums.begin(), nums.end(), t), t);
+    }
+    cin >> m;
+    for(int i = 0 ; i < m ; i++) {
+        cin >> op;
+        if(op == "add") {
+            cin >> t;
+            nums.insert(lower_bound(nums.begin(), nums.end(), t), t);
+        }
+        else {
+            cout << nums[nums.size() / 2 - (nums.size() & 1 ^ 1)] << endl;
+        }
+    }
+    return 0;
+}