Merge pull request #1455 from AlgorithmWithGod/LiiNi-coder

[20251119] PGM / LV2 / 택배상자 / 이인희

Author: ShinHeeEul

LiiNi-coder/202511/19 PGM 택배상자.md

@@ -0,0 +1,43 @@
+```java
+import java.util.*;
+
+class Solution {
+    public int solution(int[] order) {
+        int answer = 0;
+        Queue<Integer> main = new LinkedList<>();
+        for(int i = 1; i <= order.length; i++)
+            main.offer(i);
+        
+        Deque<Integer> sub = new ArrayDeque<>();
+        int index = 0;
+
+        for(int target : order){
+            while(true){
+                if(!main.isEmpty() && main.peek() <= target){
+                    if(main.peek() == target){
+                        main.poll();
+                        answer++;
+                        
+                        break;
+                    } else {
+                        sub.offer(main.poll());
+                    }
+                } else {
+                    if(!sub.isEmpty() && sub.peek() == target){
+                        sub.poll();
+                        answer++;
+                    }
+                    
+                    
+                    else {
+                        return answer;
+                    }
+                    break;
+                }
+            }
+        }
+        return answer;
+    }
+}
+
+```