diff --git "a/LiiNi-coder/202511/30 BOJ \354\272\241\355\213\264 \354\235\264\353\213\244\354\206\234.md" "b/LiiNi-coder/202511/30 BOJ \354\272\241\355\213\264 \354\235\264\353\213\244\354\206\234.md"
new file mode 100644
index 00000000..4867e399
--- /dev/null
+++ "b/LiiNi-coder/202511/30 BOJ \354\272\241\355\213\264 \354\235\264\353\213\244\354\206\234.md"	
@@ -0,0 +1,35 @@
+```java
+import java.io.*;
+import java.util.*;
+
+public class Main {
+    public static void main(String[] args) throws IOException {
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+        int N = Integer.parseInt(br.readLine());
+        List<Integer> tetra = new ArrayList<>();
+        for(int k=1; ; k++){
+            // 총알 개수
+            int t = k * (k + 1) * (k + 2) / 6;
+            if(t > N)
+                break;
+            tetra.add(t);
+        }
+        int size = tetra.size();
+        
+        
+        int[] dp = new int[N + 1];
+        Arrays.fill(dp, Integer.MAX_VALUE);
+        dp[0] = 0;
+        for(int i = 0; i < size; i++){
+            int t = tetra.get(i);
+            for(int x = t; x <= N; x++){
+                if(dp[x - t] != Integer.MAX_VALUE){
+                    dp[x] = Math.min(dp[x], dp[x-t] + 1);
+                }
+            }
+        }
+        System.out.println(dp[N]);
+    }
+}
+
+```