diff --git "a/ksinji/202512/05 BOJ \354\244\204\354\204\270\354\232\260\352\270\260.md" "b/ksinji/202512/05 BOJ \354\244\204\354\204\270\354\232\260\352\270\260.md"
new file mode 100644
index 00000000..37ffced2
--- /dev/null
+++ "b/ksinji/202512/05 BOJ \354\244\204\354\204\270\354\232\260\352\270\260.md"	
@@ -0,0 +1,30 @@
+```java
+import java.io.*;
+
+public class Main {
+    public static void main(String[] args) throws Exception {
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+        int n = Integer.parseInt(br.readLine());
+
+        int[] arr = new int[n];
+        int[] dp = new int[n];
+
+        for (int i=0; i<n; i++){
+            arr[i] = Integer.parseInt(br.readLine());
+        }
+
+        int lis = 0;
+        for (int i=0; i<n; i++){
+            dp[i] = 1;
+            for (int j=0; j<i; j++){
+                if (arr[j] < arr[i] && dp[j]+1>dp[i]){
+                    dp[i] = dp[j]+1;
+                    lis = Math.max(lis, dp[i]);
+                }
+            }
+        }
+
+        System.out.println(n-lis);
+    }
+}
+```