diff --git a/H0ngJu/README.md b/H0ngJu/README.md
index 15aa5387..1bf41770 100644
--- a/H0ngJu/README.md
+++ b/H0ngJu/README.md
@@ -5,5 +5,6 @@
 | 1차시 | 2024.03.05 |    큐    | [프로세스](https://school.programmers.co.kr/learn/courses/30/lessons/42587) | https://github.com/AlgoLeadMe/AlgoLeadMe-1/pull/151 |
 | 2차시 | 2024.03.07 |    큐    | [다리를 지나는 트럭](https://school.programmers.co.kr/learn/courses/30/lessons/42583) | https://github.com/AlgoLeadMe/AlgoLeadMe-1/pull/153 |
 | 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 |
 
 ---
diff --git "a/H0ngJu/\355\236\231/\353\254\270\354\240\234\354\247\221.py" "b/H0ngJu/\355\236\231/\353\254\270\354\240\234\354\247\221.py"
new file mode 100644
index 00000000..b09a6544
--- /dev/null
+++ "b/H0ngJu/\355\236\231/\353\254\270\354\240\234\354\247\221.py"
@@ -0,0 +1,32 @@
+import sys
+import heapq
+
+n, m = map(int, sys.stdin.readline().rstrip().split())
+
+graph = [[] for _ in range(n+1)]
+inDegree = [0 for _ in range(n+1)]
+q = []
+answer = []
+
+# 입력받아서 넣기
+for _ in range(m):
+    p1, p2 = map(int, sys.stdin.readline().rstrip().split())
+    graph[p1].append(p2) # p1은 p2와 연결된 문제
+    inDegree[p2] += 1 # 간선 추가
+
+# 진입차수가 0이면 큐에 넣기
+for i in range(1, n+1):
+    if inDegree[i] == 0:
+        heapq.heappush(q, i)
+
+# answer에 넣고, 간선 제거
+while q:
+    prob = heapq.heappop(q)
+    answer.append(prob)
+    for i in graph[prob]: # 간선 제거 & 진입차수 0인 것들 처리
+        inDegree[i] -= 1
+        if inDegree[i] == 0:
+            heapq.heappush(q, i)
+
+for result in answer:
+    print(result, end=" ")
\ No newline at end of file