diff --git "a/JeonHyoChang/Season2/23.08.16 \354\271\264\354\271\264\354\230\244 2\353\254\270\354\240\234/\354\213\244\355\214\250\354\234\250.py" "b/JeonHyoChang/Season2/23.08.16 \354\271\264\354\271\264\354\230\244 2\353\254\270\354\240\234/\354\213\244\355\214\250\354\234\250.py"
new file mode 100644
index 0000000..0de4294
--- /dev/null
+++ "b/JeonHyoChang/Season2/23.08.16 \354\271\264\354\271\264\354\230\244 2\353\254\270\354\240\234/\354\213\244\355\214\250\354\234\250.py"	
@@ -0,0 +1,23 @@
+def solution(N, stages):
+    dic = {}
+    for i in range(1, N + 1):
+        dic[i] = stages.count(i)
+
+    users = len(stages)
+    answerTemp = []
+    for i in range(1, N + 1):
+        if users != 0:
+            answerTemp.append((dic[i] / users, i))
+        else:
+            answerTemp.append((0, i))
+        users -= dic[i]
+    print(answerTemp)
+
+    answerTemp02 = sorted(answerTemp, key=lambda x: (-x[0], x[1]))
+    answer = [x[1] for x in answerTemp02]
+    return answer
+
+
+print(solution(5, [2, 1, 2, 6, 2, 4, 3, 3]))
+print(solution(4, [4, 4, 4, 4, 4]))
+print(solution(2, [1, 1, 1, 1]))
diff --git "a/JeonHyoChang/Season2/23.08.16 \354\271\264\354\271\264\354\230\244 2\353\254\270\354\240\234/\355\233\204\353\263\264\355\202\244.py" "b/JeonHyoChang/Season2/23.08.16 \354\271\264\354\271\264\354\230\244 2\353\254\270\354\240\234/\355\233\204\353\263\264\355\202\244.py"
new file mode 100644
index 0000000..47bdd2d
--- /dev/null
+++ "b/JeonHyoChang/Season2/23.08.16 \354\271\264\354\271\264\354\230\244 2\353\254\270\354\240\234/\355\233\204\353\263\264\355\202\244.py"	
@@ -0,0 +1,34 @@
+from itertools import combinations
+
+
+def solution(relation):
+    row = len(relation)
+    col = len(relation[0])
+    relationCombinations = []
+
+    for i in range(1, col + 1):
+        relationCombinations.extend(combinations(range(col), i))
+
+    # 유일성 체크
+    uniqueKeys = []
+    for x in relationCombinations:
+        tempSet = set()
+        for i in range(row):
+            tempSet.add(tuple(relation[i][j] for j in x))
+        if len(tempSet) == row:
+            uniqueKeys.append(x)
+    print(uniqueKeys)
+
+    # 최소성 체크
+    answer = set(uniqueKeys)
+    print(answer)
+    for i in range(len(uniqueKeys)):
+        for j in range(i + 1, len(uniqueKeys)):
+            if set(uniqueKeys[i]) & set(uniqueKeys[j]) == set(uniqueKeys[i]):
+                answer.discard(uniqueKeys[j])
+
+    return len(answer)
+
+
+print(solution([["100", "ryan", "music", "2"], ["200", "apeach", "math", "2"], ["300", "tube", "computer", "3"],
+                ["400", "con", "computer", "4"], ["500", "muzi", "music", "3"], ["600", "apeach", "music", "2"]]))
diff --git "a/JeonHyoChang/Season2/23.08.25 \354\271\264\354\271\264\354\230\244 2\353\254\270\354\240\234/\353\221\220 \352\260\234 \353\275\221\354\225\204\354\204\234 \353\215\224\355\225\230\352\270\260.py" "b/JeonHyoChang/Season2/23.08.25 \354\271\264\354\271\264\354\230\244 2\353\254\270\354\240\234/\353\221\220 \352\260\234 \353\275\221\354\225\204\354\204\234 \353\215\224\355\225\230\352\270\260.py"
new file mode 100644
index 0000000..59ffb60
--- /dev/null
+++ "b/JeonHyoChang/Season2/23.08.25 \354\271\264\354\271\264\354\230\244 2\353\254\270\354\240\234/\353\221\220 \352\260\234 \353\275\221\354\225\204\354\204\234 \353\215\224\355\225\230\352\270\260.py"	
@@ -0,0 +1,13 @@
+def solution(numbers):
+    answer = set()
+
+    for i in range(len(numbers)):
+        for j in range(i + 1, len(numbers)):
+            answer.add(numbers[i] + numbers[j])
+    answer = list(answer)
+    answer.sort()
+    return answer
+
+
+print(solution([2, 1, 3, 4, 1]))
+print(solution(([5, 0, 2, 7])))
diff --git "a/JeonHyoChang/Season2/23.08.25 \354\271\264\354\271\264\354\230\244 2\353\254\270\354\240\234/\353\254\270\354\236\220\354\227\264 \354\225\225\354\266\225.py" "b/JeonHyoChang/Season2/23.08.25 \354\271\264\354\271\264\354\230\244 2\353\254\270\354\240\234/\353\254\270\354\236\220\354\227\264 \354\225\225\354\266\225.py"
new file mode 100644
index 0000000..47929b3
--- /dev/null
+++ "b/JeonHyoChang/Season2/23.08.25 \354\271\264\354\271\264\354\230\244 2\353\254\270\354\240\234/\353\254\270\354\236\220\354\227\264 \354\225\225\354\266\225.py"	
@@ -0,0 +1,34 @@
+def combine(c, s):
+    if c != 1:
+        return str(c) + s
+    return s
+
+
+def solution(s):
+    answer = s
+
+    for i in range(1, len(s) // 2 + 1):
+        tempStr = ""
+        startStr = s[0:i]
+        count = 1
+        for j in range(i, len(s), i):
+            if s[j:j + i] == startStr:
+                count += 1
+            else:
+                tempStr += combine(count, startStr)
+                startStr = s[j:j + i]
+                count = 1
+        tempStr += combine(count, startStr)
+        print(tempStr)
+        if len(answer) > len(tempStr) or i == 1:
+            answer = tempStr
+
+    return len(answer)
+
+
+# print(solution("aabbaccc"))
+# print(solution("ababcdcdababcdcd"))
+# print(solution("abcabcdede"))
+# print(solution("abcabcabcabcdededededede"))
+# print(solution("xababcdcdababcdcd"))
+# print(solution("a"))
diff --git "a/JeonHyoChang/Season2/23.08.30 \354\271\264\354\271\264\354\230\244 2\353\254\270\354\240\234/\354\212\244\355\213\260\354\273\244\353\252\250\354\234\274\352\270\260(2).py" "b/JeonHyoChang/Season2/23.08.30 \354\271\264\354\271\264\354\230\244 2\353\254\270\354\240\234/\354\212\244\355\213\260\354\273\244\353\252\250\354\234\274\352\270\260(2).py"
new file mode 100644
index 0000000..b967826
--- /dev/null
+++ "b/JeonHyoChang/Season2/23.08.30 \354\271\264\354\271\264\354\230\244 2\353\254\270\354\240\234/\354\212\244\355\213\260\354\273\244\353\252\250\354\234\274\352\270\260(2).py"	
@@ -0,0 +1,21 @@
+def solution(sticker):
+    answer01 = []
+    answer02 = []
+
+    answer01.append(0)
+    answer02.append(sticker[0])
+
+    if len(sticker) > 1:
+        answer01.append(sticker[1])
+        answer02.append(sticker[0])
+
+    for i in range(2, len(sticker)):
+        answer01.append(max(answer01[i - 1], answer01[i - 2] + sticker[i]))
+        answer02.append(max(answer02[i - 1], answer02[i - 2] + sticker[i]))
+
+    if len(sticker) == 1:
+        return sticker[0]
+    return max(answer01[len(sticker) - 1], answer02[len(sticker) - 2])
+
+
+print(solution([14, 6, 5, 11, 3, 9, 2, 10]))
diff --git "a/JeonHyoChang/Season2/23.08.30 \354\271\264\354\271\264\354\230\244 2\353\254\270\354\240\234/\354\230\244\355\224\210\354\261\204\355\214\205\353\260\251.py" "b/JeonHyoChang/Season2/23.08.30 \354\271\264\354\271\264\354\230\244 2\353\254\270\354\240\234/\354\230\244\355\224\210\354\261\204\355\214\205\353\260\251.py"
new file mode 100644
index 0000000..a0c4416
--- /dev/null
+++ "b/JeonHyoChang/Season2/23.08.30 \354\271\264\354\271\264\354\230\244 2\353\254\270\354\240\234/\354\230\244\355\224\210\354\261\204\355\214\205\353\260\251.py"	
@@ -0,0 +1,25 @@
+def solution(record):
+    answer = []
+
+    userDic = {}
+    recordChet = []
+    for x in record:
+        temp = x.split(" ")
+        if temp[0] == "Enter" or temp[0] == "Leave":
+            recordChet.append((temp[0], temp[1]))
+        if temp[0] != "Leave":
+            userDic[temp[1]] = temp[2]
+
+    for y in recordChet:
+        tempStr = userDic[y[1]] + "님이 "
+        if y[0] == "Enter":
+            answer.append(tempStr + "들어왔습니다.")
+        else:
+            answer.append(tempStr + "나갔습니다.")
+
+    return answer
+
+
+print(solution(
+    ["Enter uid1234 Muzi", "Enter uid4567 Prodo", "Leave uid1234", "Enter uid1234 Prodo", "Change uid4567 Ryan"]))
+
diff --git "a/JeonHyoChang/Season2/23.09.08 \354\271\264\354\271\264\354\230\244 1\353\254\270\354\240\234/\354\213\240\352\263\240 \352\262\260\352\263\274 \353\260\233\352\270\260.py" "b/JeonHyoChang/Season2/23.09.08 \354\271\264\354\271\264\354\230\244 1\353\254\270\354\240\234/\354\213\240\352\263\240 \352\262\260\352\263\274 \353\260\233\352\270\260.py"
new file mode 100644
index 0000000..c8b9d9e
--- /dev/null
+++ "b/JeonHyoChang/Season2/23.09.08 \354\271\264\354\271\264\354\230\244 1\353\254\270\354\240\234/\354\213\240\352\263\240 \352\262\260\352\263\274 \353\260\233\352\270\260.py"	
@@ -0,0 +1,33 @@
+def solution(id_list, report, k):
+    answer = []
+
+    reportDic = {}
+    reportCountDic = {}
+    for x in id_list:
+        reportDic[x] = set()
+        reportCountDic[x] = 0
+
+    for y in report:
+        user = y.split(" ")
+        reportDic[user[0]].add(user[1])
+
+    for z in id_list:
+        temp = reportDic[z]
+        for i in temp:
+            reportCountDic[i] += 1
+
+    banSet = set()
+    for z in id_list:
+        if reportCountDic[z] >= k:
+            banSet.add(z)
+
+    for z in id_list:
+        answer.append(len(reportDic[z] & banSet))
+
+    return answer
+
+
+print(
+    solution(["muzi", "frodo", "apeach", "neo"], ["muzi frodo", "apeach frodo", "frodo neo", "muzi neo", "apeach muzi"],
+             2))
+print(solution(["con", "ryan"], ["ryan con", "ryan con", "ryan con", "ryan con"], 3))