diff --git a/g0rnn/BruteForce/4-g0rnn.cpp b/g0rnn/BruteForce/4-g0rnn.cpp
new file mode 100644
index 0000000..af9f4ee
--- /dev/null
+++ b/g0rnn/BruteForce/4-g0rnn.cpp
@@ -0,0 +1,32 @@
+#include <iostream>
+#include <string>
+using namespace std;
+
+bool is_end_num(int end_num)
+{
+    string num = to_string(end_num);
+    int check = 0;
+    for (int i = 0; i < num.length() - 2; i++)
+        if (num[i] == '6' && num[i + 1] == '6' && num[i + 2] == '6')
+            return true;
+
+    return false;
+}
+
+int main()
+{
+    ios_base::sync_with_stdio(false);
+    cin.tie(NULL);
+
+    int end_num = 666;
+    int cnt, ctr = 1;
+    cin >> cnt;
+    while (ctr != cnt)
+    {
+        end_num++;
+        if (is_end_num(end_num))
+            ctr++;
+    }
+    cout << end_num;
+    return 0;
+}
\ No newline at end of file
diff --git a/g0rnn/README.md b/g0rnn/README.md
index 9b095df..8dba38e 100644
--- a/g0rnn/README.md
+++ b/g0rnn/README.md
@@ -1,6 +1,10 @@
-## ✏️ 기록   
+## ✏️ 기록
+
+| 차시  |    날짜    |  문제유형  |                                     링크                                      |                        풀이                         |
+| :---: | :--------: | :--------: | :---------------------------------------------------------------------------: | :-------------------------------------------------: |
+| 1차시 | 2024.10.01 |    구현    | [추억 점수](https://school.programmers.co.kr/learn/courses/30/lessons/176963) | https://github.com/AlgoLeadMe/AlgoLeadMe-1/pull/35  |
+| 2차시 | 2024.10.03 |    트리    |   [LCA2](https://school.programmers.co.kr/learn/courses/30/lessons/176963)    | https://github.com/AlgoLeadMe/AlgoLeadMe-12/pull/7  |
+| 3차시 | 2024.10.04 |   문자열   |             [잃어버린 괄호](https://www.acmicpc.net/problem/1541)             | https://github.com/AlgoLeadMe/AlgoLeadMe-12/pull/9  |
+| 4차시 | 2024.10.11 | 브루트포스 |              [영화감독 숌](https://www.acmicpc.net/problem/1436)              | https://github.com/AlgoLeadMe/AlgoLeadMe-12/pull/15 |
 
-| 차시 |    날짜    | 문제유형 | 링크 | 풀이 |
-|:----:|:---------:|:----:|:-----:|:----:|
-| 1차시 | 2024.10.01 |  구현  | [추억 점수](https://school.programmers.co.kr/learn/courses/30/lessons/176963)|https://github.com/AlgoLeadMe/AlgoLeadMe-1/pull/35|
 ---