diff --git a/src/week2/BOJ1436/BOJ1436_V1.cpp b/src/week2/BOJ1436/BOJ1436_V1.cpp
new file mode 100644
index 0000000..06d507f
--- /dev/null
+++ b/src/week2/BOJ1436/BOJ1436_V1.cpp
@@ -0,0 +1,26 @@
+#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 num = 665;
+    int cnt=0;
+
+    while(true) {
+        num++;
+        if (to_string(num).find("666") != string::npos) {
+            cnt++;
+        }
+        if (N == cnt) {
+            cout << num;
+            break;
+        }
+    }
+
+    return 0;
+}
\ No newline at end of file