From 1da658c871b2dc762de97eabf86f6c9d78dd9107 Mon Sep 17 00:00:00 2001
From: Jihoon Lee <hiyabye0465@gmail.com>
Date: Mon, 17 Jun 2024 17:30:43 +0900
Subject: [PATCH] Add 15234.cpp

---
 15xxx/15234.cpp | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)
 create mode 100644 15xxx/15234.cpp

diff --git a/15xxx/15234.cpp b/15xxx/15234.cpp
new file mode 100644
index 00000000..d05c7bdb
--- /dev/null
+++ b/15xxx/15234.cpp
@@ -0,0 +1,24 @@
+#include <iostream>
+#include <unordered_map>
+#include <vector>
+using namespace std;
+
+void solve(void) {
+  int n, k; cin >> n >> k;
+  vector<int> v(n);
+  for (int i=0; i<n; i++) cin >> v[i];
+
+  unordered_map<int, int> m;
+  for (int i=0; i<n-1; i++) for (int j=i+1; j<n; j++) {
+    m[v[i]+v[j]]++;
+  }
+  cout << m[k];
+}
+
+int main(void) {
+  ios::sync_with_stdio(false);
+  cin.tie(nullptr);
+
+  solve();
+  return 0;
+}
\ No newline at end of file