1 files changed, 31 insertions, 0 deletions
diff --git a/store/works/solutions/acwing/1204.cpp b/store/works/solutions/acwing/1204.cpp
new file mode 100644
index 0000000..e3e5395
--- /dev/null
+++ b/store/works/solutions/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;
+}