diff --git a/code_study/Baekjoon/python/2098.py b/code_study/Baekjoon/python/2098.py
new file mode 100644
index 0000000..af2112d
--- /dev/null
+++ b/code_study/Baekjoon/python/2098.py
@@ -0,0 +1,29 @@
+import sys
+input = sys.stdin.readline
+Inf = sys.maxsize
+
+N = int(input())
+W = [list(map(int, input().split())) for _ in range(N)]
+
+dp = [[None] * (2**N) for _ in range(N)]
+
+def trevel(now, visited) :
+    if visited == ((1 << N) - 1) :
+        return w if (w := W[now][0]) != 0 else Inf
+
+    if dp[now][visited] is not None :
+        return dp[now][visited]
+    
+    min_cost = Inf
+    for nxt in range(N) :
+        if W[now][nxt] == 0 or (visited & (1 << nxt)) != 0 :
+            continue
+        
+        cost = W[now][nxt] + trevel(nxt, visited | (1 << nxt))
+        min_cost = min(min_cost, cost)
+    
+    dp[now][visited] = min_cost
+    
+    return dp[now][visited]
+
+print(trevel(0, 1))
\ No newline at end of file
diff --git a/code_study/Baekjoon/python/6749.py b/code_study/Baekjoon/python/6749.py
new file mode 100644
index 0000000..9ba6a07
--- /dev/null
+++ b/code_study/Baekjoon/python/6749.py
@@ -0,0 +1 @@
+print((lambda x, y : y + (y-x))(int(input()), int(input())))
\ No newline at end of file
diff --git a/code_study/Baekjoon/python/9328.py b/code_study/Baekjoon/python/9328.py
new file mode 100644
index 0000000..8173c92
--- /dev/null
+++ b/code_study/Baekjoon/python/9328.py
@@ -0,0 +1,64 @@
+from collections import deque
+import sys
+input = sys.stdin.readline
+
+ans = []
+
+def solv() :
+    h, w = map(int, input().split())
+    
+    Map = []
+    Map.append("." * (w + 2))
+    for _ in range(h) :
+        Map.append("." + input().rstrip() + ".")
+    Map.append("." * (w + 2))
+    
+    key = [False] * 26
+    for k in input().rstrip() :
+        if k != "0" :
+            key[ord(k) - ord("a")] = True
+            
+    qu = deque()
+    gate = [deque() for _ in range(26)]
+    qu.append((0,0))
+    visited = [[False] * (w + 2) for _ in range(h + 2)]
+    res = 0
+    
+    while qu :
+        cx, cy = qu.popleft()
+        
+        for dx, dy in zip([1,-1,0,0], [0,0,1,-1]) :
+            nx, ny = cx + dx, cy + dy
+            
+            if nx < 0 or nx >= w+2 or ny < 0 or ny >= h+2 or visited[ny][nx] or Map[ny][nx] == "*" :
+                continue
+            
+            ch = Map[ny][nx]
+            
+            if ord("A") <= ord(ch) <= ord("Z") :
+                if not key[ord(ch) - ord("A")] :
+                    gate[ord(ch) - ord("A")].append((nx, ny))
+                else :
+                    qu.append((nx, ny))
+            
+            elif ord("a") <= ord(ch) <= ord("z") :
+                qu.append((nx, ny))
+                key[ord(ch) - ord("a")] = True
+                while gate[ord(ch) - ord("a")] :
+                    qu.append(gate[ord(ch) - ord("a")].popleft())
+            
+            elif ch == "$" :
+                res += 1
+                qu.append((nx, ny))
+            
+            else :
+                qu.append((nx, ny))
+            
+            visited[ny][nx] = True
+            
+    ans.append(res)
+
+for _ in range(int(input())) :
+    solv()
+
+print("\n".join(map(str, ans)))
\ No newline at end of file