From 4fa3de11fe9b8c7436b5b5f80fee4a8b68e11b60 Mon Sep 17 00:00:00 2001
From: crupest <crupest@outlook.com>
Date: Thu, 25 Feb 2021 23:07:24 +0800
Subject: Add acwing 1204.

---
 acwing/1204.cpp | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)
 create mode 100644 acwing/1204.cpp

(limited to 'acwing')

diff --git a/acwing/1204.cpp b/acwing/1204.cpp
new file mode 100644
index 0000000..e3e5395
--- /dev/null
+++ b/acwing/1204.cpp
@@ -0,0 +1,31 @@
+#include <ios>
+#include <iostream>
+#include <set>
+
+int main() {
+  std::ios_base::sync_with_stdio(false);
+
+  int repeat;
+
+  int n;
+  std::cin >> n;
+
+  std::set<int> ids;
+
+  while (std::cin >> n) {
+    auto result = ids.insert(n);
+    if (!result.second)
+      repeat = n;
+  }
+
+  auto iter = ids.cbegin();
+
+  int last = *iter++;
+
+  while (++last == *iter++)
+    ;
+
+  std::cout << last << ' ' << repeat;
+
+  return 0;
+}
-- 
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