diff --git "a/\354\213\240\352\262\275\354\244\200/Week5.js" "b/\354\213\240\352\262\275\354\244\200/Week5.js"
new file mode 100644
index 0000000..c4bbc95
--- /dev/null
+++ "b/\354\213\240\352\262\275\354\244\200/Week5.js"
@@ -0,0 +1,24 @@
+function solution(n) {
+    let answer = '';
+    while (true) {
+        if ((n % 3) === 0) {
+            n = n - 1;
+            let remain = 4;
+            answer = remain.toString() + answer;
+        }
+
+        else {
+            let remain = parseInt(n % 3);
+            answer = remain.toString() + answer;
+        }
+        n = parseInt(n / 3);
+        if (n < 3) {
+            if (n != 0) {
+                answer = n + answer;
+            }
+            break;
+        }
+    }
+
+    return answer;
+}