diff --git a/src/week5/BOJ3273/BOJ3273_V1.cpp b/src/week5/BOJ3273/BOJ3273_V1.cpp
new file mode 100644
index 0000000..8d09b24
--- /dev/null
+++ b/src/week5/BOJ3273/BOJ3273_V1.cpp
@@ -0,0 +1,30 @@
+#include <bits/stdc++.h>
+using namespace std;
+int main() {
+
+    int n;
+    cin >> n;
+    int arr[100000];
+
+    for (int i=0; i<n; i++) cin >> arr[i];
+
+    sort(arr, arr+n);
+    int target;
+    cin >> target;
+    int st=0, ed=n-1, ret=0;
+    while(st < ed) {
+        if (arr[st] + arr[ed] < target) {
+            st++;
+        } else if (arr[st] + arr[ed] > target) {
+            ed--;
+        } else {
+            ret++;
+            st++;
+            ed--;
+        }
+    }
+
+    cout << ret;
+
+    return 0;
+}
\ No newline at end of file