diff --git "a/leetcode3/\352\271\200\353\257\274\354\240\234/3992. Rearrange String to Avoid Character Pair.py" "b/leetcode3/\352\271\200\353\257\274\354\240\234/3992. Rearrange String to Avoid Character Pair.py"
new file mode 100644
index 00000000..5a03991a
--- /dev/null
+++ "b/leetcode3/\352\271\200\353\257\274\354\240\234/3992. Rearrange String to Avoid Character Pair.py"	
@@ -0,0 +1,24 @@
+class Solution:
+    def rearrangeString(self, s: str, x: str, y: str) -> str:
+        result = []
+        x_count = s.count(x)#O(n)
+        y_count = s.count(y)#O(n)
+
+        if s.find(x) ==-1 or s.find(y) ==-1: #O(n)
+            result.append(s)
+        else:
+            for s1 in s:
+                if s1 == y:
+                    result.insert(0,s1) #O(n^2)
+                elif s1 != x:
+                    result.append(s1)
+            result.insert(y_count,x*x_count)
+        return ''.join(result)
+
+s = "zaodvxbsvqstlrbn"
+x = "t"
+y = "s"
+solution = Solution()
+print(solution.rearrangeString(s,x,y))
+
+
diff --git "a/leetcode3/\352\271\200\353\257\274\354\240\234/948. Bag of Tokens.py" "b/leetcode3/\352\271\200\353\257\274\354\240\234/948. Bag of Tokens.py"
new file mode 100644
index 00000000..48e74498
--- /dev/null
+++ "b/leetcode3/\352\271\200\353\257\274\354\240\234/948. Bag of Tokens.py"	
@@ -0,0 +1,29 @@
+from typing import List
+
+
+class Solution:
+    def bagOfTokensScore(self, tokens: List[int], power: int) -> int:
+        tokens.sort()  #nlog(n)
+        left = 0 #가장 작은 토큰
+        right = len(tokens)-1 #가장 큰 토큰
+        score = 0
+        max_score = 0
+        while left <=right:#O(n)
+            if power >=tokens[left]:#face-up
+                power -= tokens[left]
+                score += 1
+                left += 1
+                max_score = max(max_score,score)
+            elif score > 0 and left < right:#face-down
+                power += tokens[right]
+                score -= 1
+                right -= 1
+            else:
+                break
+        return max_score
+
+
+tokens = [100,200,300,400]
+power = 200
+solution = Solution()
+print(solution.bagOfTokensScore(tokens,power))