diff --git "a/LiiNi-coder/202512/09 PGM \355\225\240\354\235\270 \355\226\211\354\202\254.md" "b/LiiNi-coder/202512/09 PGM \355\225\240\354\235\270 \355\226\211\354\202\254.md"
new file mode 100644
index 00000000..2649a647
--- /dev/null
+++ "b/LiiNi-coder/202512/09 PGM \355\225\240\354\235\270 \355\226\211\354\202\254.md"	
@@ -0,0 +1,48 @@
+```java
+import java.util.*;
+
+class Solution {
+    private static HashMap<String, Integer> wordsIndex;
+
+    public int solution(String[] wants, int[] number, String[] discounts) {
+        int answer = 0;
+        wordsIndex = new HashMap<String, Integer>();
+        int i = 0;
+        for(String want : wants){
+            wordsIndex.put(want, i++);
+        }
+        int[] counts = new int[wants.length];
+        
+        ArrayDeque<String> q = new ArrayDeque<String>();
+        String polled;
+        for(String discount : discounts){
+            if(wordsIndex.containsKey(discount)){
+                counts[wordsIndex.get(discount)]++;
+            }
+            q.offer(discount);
+            if(q.size() > 10){
+                polled = q.poll();
+                if(wordsIndex.containsKey(polled)){
+                    counts[wordsIndex.get(polled)]--;
+                }
+            }
+
+            if(q.size() == 10){
+                boolean ok = true;
+                for(int k=0; k<number.length; k++){
+                    if(counts[k] < number[k]){
+                        ok = false;
+                        break;
+                    }
+                }
+                if(ok){
+                    answer++;
+                }
+            }
+        }
+
+        return answer;
+    }
+}
+
+```