diff --git a/hadongun/README.md b/hadongun/README.md
index 5007188..9ecb9dc 100644
--- a/hadongun/README.md
+++ b/hadongun/README.md
@@ -1,10 +1,13 @@
-## ✏️ 기록   
+### ✏️ 기록   
  
  | 차시 |    날짜    | 문제유형 | 링크 | 풀이 |
  |:----:|:---------:|:----:|:-----:|:----:|
- | 1차시 | 2024.10.01 |  구현  | [추억 점수](https://school.programmers.co.kr/learn/courses/30/lessons/176963)|https://github.com/AlgoLeadMe/AlgoLeadMe-1/pull/35|
- | 2차시 | 2025-03-21  | 그리디 알고리즘   | [로프] (https://www.acmicpc.net/problem/2217)
- | 3차시 | 2025-03-21  | 수학             | [보물] (https://www.acmicpc.net/problem/1026)
- | 4차시 | 2025-03-27  | 큐               | [카드2] (https://www.acmicpc.net/problem/2164)
- | 5차시 | 2025-04-02  | 스택             | [스택2] (https://www.acmicpc.net/problem/28278)
- | 6차시 | 2025-04-04  | 정렬             | [단어정렬](https://www.acmicpc.net/problem/1181)
\ No newline at end of file
+ | 1차시 | 2025.03.18 |  그리디 알고리즘  | [설탕 배달](https://www.acmicpc.net/problem/2839)|https://github.com/AlgoLeadMe/AlgoLeadMe-13/pull/2|
+ | 2차시 | 2025.03.21 |  그리디 알고리즘  | [로프](https://www.acmicpc.net/problem/2217)|https://github.com/AlgoLeadMe/AlgoLeadMe-13/pull/7|
+ | 3차시 | 2025.03.25 |  수학  | [보물](https://www.acmicpc.net/problem/1026)|https://github.com/AlgoLeadMe/AlgoLeadMe-13/pull/11|
+ | 4차시 | 2025.03.27 |  큐  | [ 카드2 ](https://www.acmicpc.net/problem/2164)|https://github.com/AlgoLeadMe/AlgoLeadMe-13/pull/13|
+ | 5차시 | 2025.04.02 |  스택  | [스택2](https://www.acmicpc.net/problem/28278)|https://github.com/AlgoLeadMe/AlgoLeadMe-13/pull/20|
+ | 6차시 | 2025.04.04 |  정렬  | [단어 정렬](https://www.acmicpc.net/problem/1181)|https://github.com/AlgoLeadMe/AlgoLeadMe-13/pull/21|
+ | 7차시 | 2025.04.07 |  스택  | [균형 잡힌 세상](https://www.acmicpc.net/problem/4949)|https://github.com/AlgoLeadMe/AlgoLeadMe-13/pull/25|
+
+ ---
\ No newline at end of file
diff --git "a/hadongun/\352\267\270\353\246\254\353\223\234 \354\225\214\352\263\240\353\246\254\354\246\230/\354\225\214\353\260\224\354\203\235 \352\260\225\355\230\270.py" "b/hadongun/\352\267\270\353\246\254\353\223\234 \354\225\214\352\263\240\353\246\254\354\246\230/\354\225\214\353\260\224\354\203\235 \352\260\225\355\230\270.py"
new file mode 100644
index 0000000..c9372ef
--- /dev/null
+++ "b/hadongun/\352\267\270\353\246\254\353\223\234 \354\225\214\352\263\240\353\246\254\354\246\230/\354\225\214\353\260\224\354\203\235 \352\260\225\355\230\270.py"	
@@ -0,0 +1,14 @@
+import sys
+N = int(input())
+tip_temp = map(int ,[sys.stdin.readline().strip() for _ in range(N)])
+tip = list(tip_temp)
+tip.sort(reverse = True)
+receive = 0
+for i in range(1, N + 1):
+    if tip[i-1] + 1 - i < 0:
+        continue
+    receive += (tip[i-1] + 1 - i)
+
+print(receive)
+            
+    
diff --git "a/hadongun/\354\212\244\355\203\235/\352\267\240\355\230\225\354\236\241\355\236\214 \354\204\270\354\203\201.py" "b/hadongun/\354\212\244\355\203\235/\352\267\240\355\230\225\354\236\241\355\236\214 \354\204\270\354\203\201.py"
new file mode 100644
index 0000000..399a313
--- /dev/null
+++ "b/hadongun/\354\212\244\355\203\235/\352\267\240\355\230\225\354\236\241\355\236\214 \354\204\270\354\203\201.py"	
@@ -0,0 +1,64 @@
+import sys
+while True:
+    charrr = sys.stdin.readline().rstrip()
+    if charrr == ".":
+        break
+    are_you_balanced = True
+    stack = []
+    for ch in charrr:
+        if ch == "(" or ch == "[":
+            stack.append(ch)
+        elif ch == ")":
+            if stack and stack[-1] == "(":
+                stack.pop()
+            else:
+                are_you_balanced = False
+                break
+        elif ch == "]":
+            if stack and stack[-1] == "[":
+                stack.pop()
+            else:
+                are_you_balanced = False
+                break
+    if are_you_balanced and not stack:
+        print("yes")
+    else:
+        print("no")
+
+'''import sys
+stack = []
+roundbalance = 0
+anglebalance = 0
+while True:
+    charrr = sys.stdin.readline().strip()
+    for ch in charrr:
+        stack.append(ch)
+    if charrr == "":
+        break
+    while stack:
+        if stack[-1] == "(":
+            roundbalance += 1
+            stack.pop()
+        elif stack[-1] == ")":
+            roundbalance -= 1
+            stack.pop()
+        elif stack[-1] == "[":
+            anglebalance += 1
+            stack.pop()
+        elif stack[-1] == "]":
+            anglebalance -= 1
+            stack.pop()
+        else:
+            stack.pop()
+        if len(stack) == 0:
+            break
+    if roundbalance == 0 and anglebalance == 0:
+        print("yes")
+    else:
+        print("no")'''
+        
+        
+            
+        
+    
+