diff --git a/src/week6/BOJ1269/BOJ1269_V1.cpp b/src/week6/BOJ1269/BOJ1269_V1.cpp
new file mode 100644
index 0000000..f00b5dc
--- /dev/null
+++ b/src/week6/BOJ1269/BOJ1269_V1.cpp
@@ -0,0 +1,34 @@
+#include <bits/stdc++.h>
+using namespace std;
+int main() {
+
+    ios_base::sync_with_stdio(false);
+    cin.tie(nullptr);
+    cout.tie(nullptr);
+
+    map<int, int> m;
+    int a,b;
+    cin >> a >> b;
+    for (int i=0; i<a; i++) {
+        int num;
+        cin >> num;
+        m[num] = 1;
+    }
+    for (int i=0; i<b; i++) {
+        int num;
+        cin >> num;
+        if (m[num]) {
+            m.erase(num);
+        } else {
+            m[num] = 1;
+        }
+    }
+
+    cout << m.size() << '\n';
+
+
+
+
+
+    return 0;
+}
\ No newline at end of file