diff --git a/src/week4/BOJ1094/BOJ1094_V1.cpp b/src/week4/BOJ1094/BOJ1094_V1.cpp
new file mode 100644
index 0000000..316d5bc
--- /dev/null
+++ b/src/week4/BOJ1094/BOJ1094_V1.cpp
@@ -0,0 +1,20 @@
+#include <bits/stdc++.h>
+using namespace std;
+int main() {
+
+    ios_base::sync_with_stdio(false);
+    cin.tie(NULL);
+    cout.tie(NULL);
+
+    int N;
+    cin >> N;
+
+    int cnt= 0;
+    for (int i=0; i<8; i++) {
+        if (N & (1 << i)) cnt++;
+    }
+
+    cout << cnt << '\n';
+
+    return 0;
+}
\ No newline at end of file