diff --git "a/H0ngJu/DFS/\355\212\270\353\246\254\354\235\230 \354\247\200\353\246\204.py" "b/H0ngJu/DFS/\355\212\270\353\246\254\354\235\230 \354\247\200\353\246\204.py"
new file mode 100644
index 00000000..7fb0fd9f
--- /dev/null
+++ "b/H0ngJu/DFS/\355\212\270\353\246\254\354\235\230 \354\247\200\353\246\204.py"	
@@ -0,0 +1,28 @@
+import sys
+sys.setrecursionlimit(10**9)
+def input() : return sys.stdin.readline().rstrip()
+
+n = int(input())
+tree = [[] for _ in range(n+1)]
+visited = [-1] * (n+1)
+visited[1] = 0
+
+for i in range(n-1):
+    v, u, w = map(int, input().split())
+    tree[v].append((u, w))
+    tree[u].append((v, w))
+
+def dfs(start, dis):
+    for node, node_dis in tree[start]:
+        if visited[node] == -1:
+            visited[node] = dis + node_dis
+            dfs(node, dis + node_dis)
+
+dfs(1,0)
+
+far_node = visited.index(max(visited))
+visited = [-1] * (n+1)
+visited[far_node] = 0
+dfs(far_node, 0)
+
+print(max(visited))
\ No newline at end of file
diff --git a/H0ngJu/README.md b/H0ngJu/README.md
index 957950e0..6ac80a48 100644
--- a/H0ngJu/README.md
+++ b/H0ngJu/README.md
@@ -28,5 +28,6 @@
 | 24차시 | 2024.08.17 | BFS | [아기상어](https://www.acmicpc.net/problem/16236) | https://github.com/AlgoLeadMe/AlgoLeadMe-1/pull/233 |
 | 25차시 | 2024.08.17 | DFS | [친구비](https://www.acmicpc.net/problem/16562) | https://github.com/AlgoLeadMe/AlgoLeadMe-1/pull/234 |
 | 26차시 | 2024.08.24 | 그리디 | [신입사원](https://www.acmicpc.net/problem/1946) | https://github.com/AlgoLeadMe/AlgoLeadMe-1/pull/237 |
+| 27차시 | 2024.08.27 | DFS | [트리의 지름](https://www.acmicpc.net/problem/1967) | https://github.com/AlgoLeadMe/AlgoLeadMe-1/pull/240 |
 
 ---
diff --git "a/H0ngJu/\353\262\240\354\212\244\355\212\270\354\225\250\353\262\224.py" "b/H0ngJu/\355\225\264\354\213\234/\353\262\240\354\212\244\355\212\270\354\225\250\353\262\224.py"
similarity index 100%
rename from "H0ngJu/\353\262\240\354\212\244\355\212\270\354\225\250\353\262\224.py"
rename to "H0ngJu/\355\225\264\354\213\234/\353\262\240\354\212\244\355\212\270\354\225\250\353\262\224.py"