diff --git a/src/week4/BOJ5430/BOJ5430_V1.cpp b/src/week4/BOJ5430/BOJ5430_V1.cpp
new file mode 100644
index 0000000..3892cc9
--- /dev/null
+++ b/src/week4/BOJ5430/BOJ5430_V1.cpp
@@ -0,0 +1,64 @@
+#include <bits/stdc++.h>
+using namespace std;
+int T;
+deque<int> split(string s, char delim){
+    deque<int> return_vec;
+    auto start = 0;
+    auto end = s.find(delim);
+    while(end != string::npos){
+        return_vec.push_back(stoi(s.substr(start, end - start)));
+        start = end + 1;
+        end = s.find(delim, start);
+    }
+    return_vec.push_back(stoi(s.substr(start)));
+    return return_vec;
+}
+int main() {
+
+    cin >> T;
+
+    for (int i = 0; i < T; i++) {
+        string func, inp_num;
+        int inp_num_cnt;
+        bool flag = true;
+        bool reverse_flag = false;
+        cin >> func >> inp_num_cnt >> inp_num;
+        inp_num = inp_num.substr(1, inp_num.size() - 2);
+        deque<int> ret;
+        if (inp_num.size())
+            ret = split(inp_num,',');
+
+        for (int j=0; j<func.size(); j++) {
+            if (func[j] == 'R' && ret.size()) {
+                reverse_flag = !reverse_flag;
+            } else {
+                if (ret.empty()) {
+                    flag= false;
+                    break;
+                } else {
+                    if (reverse_flag) {
+                        ret.pop_back();
+                    } else {
+                        ret.pop_front();
+                    }
+                }
+            }
+        }
+        if (reverse_flag) reverse(ret.begin(), ret.end());
+
+        if (flag) {
+            cout << "[";
+            for (int k=0; k<ret.size(); k++) {
+                if (k != ret.size() - 1) {
+                    cout << ret[k] << ",";
+                } else {
+                    cout << ret[k];
+                }
+            }
+            cout << "]\n";
+        } else cout << "error" << '\n';
+    }
+
+
+    return 0;
+}
\ No newline at end of file