diff --git a/H0ngJu/README.md b/H0ngJu/README.md
index 2d0adb09..537e6d70 100644
--- a/H0ngJu/README.md
+++ b/H0ngJu/README.md
@@ -7,5 +7,6 @@
 | 3차시 | 2024.03.10 |    힙    |             [N번째 큰 수](https://www.acmicpc.net/problem/2075)             | https://github.com/AlgoLeadMe/AlgoLeadMe-1/pull/156 |
 | 4차시 | 2024.03.13 |    힙    |               [문제집](https://www.acmicpc.net/problem/1766)                | https://github.com/AlgoLeadMe/AlgoLeadMe-1/pull/158 |
 | 5차시 | 2024.03.16 |   구현   |            [요세푸스 문제](https://www.acmicpc.net/problem/1158)            | https://github.com/AlgoLeadMe/AlgoLeadMe-1/pull/161 |
+| 6차시 | 2024.03.19 |   스택   |               [오큰수](https://www.acmicpc.net/problem/17298)               | https://github.com/AlgoLeadMe/AlgoLeadMe-1/pull/164 |
 
 ---
diff --git "a/H0ngJu/\354\230\244\355\201\260\354\210\230.py" "b/H0ngJu/\354\230\244\355\201\260\354\210\230.py"
new file mode 100644
index 00000000..a9fbaaee
--- /dev/null
+++ "b/H0ngJu/\354\230\244\355\201\260\354\210\230.py"
@@ -0,0 +1,25 @@
+import sys
+from collections import *
+
+def input(): return sys.stdin.readline().strip()
+N = int(input())
+
+arr = list(map(int, input().split()))
+arr.reverse()
+answer = [-1 for _ in range(N)]
+
+id = 0
+
+stack = []
+stack.append((id,arr.pop()))
+
+while arr:
+    id += 1
+    arr_data = arr.pop()
+    while stack and stack[-1][1] < arr_data:
+        index, data = stack.pop()
+        answer[index] = arr_data
+    stack.append((id, arr_data))
+
+for i in answer:
+    print(i, end=" ")
\ No newline at end of file