diff --git a/Ssafy_test/src/D2/SWEA_1204.java b/Ssafy_test/src/D2/SWEA_1204.java
new file mode 100644
index 0000000..080fab5
--- /dev/null
+++ b/Ssafy_test/src/D2/SWEA_1204.java
@@ -0,0 +1,44 @@
+package D2;
+
+import java.io.*;
+import java.util.*;
+
+public class SWEA_1204 {
+
+	public static void main(String[] args) throws IOException {
+		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+		BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
+		
+		int num = Integer.parseInt(br.readLine());
+		
+		for(int i = 0; i<num;i++) {
+			List<Integer> li = new ArrayList<>();
+			int[] lis = new int[101];
+			
+			int n = Integer.parseInt(br.readLine());
+			StringTokenizer st = new StringTokenizer(br.readLine());
+			
+			for(int j = 0; j<1000; j++ ) {
+				int a = Integer.parseInt(st.nextToken());
+				lis[a]++; //하나 증가
+			}
+			
+//			Arrays.asList(lis); //이건 보이기에만 이렇게 바꾼거라, get, max 등을 몼써..
+			
+			for(int l:lis) {
+				li.add(l); //직접 값을 복사
+			}
+			
+			bw.write("#" + n + " ");
+			
+			for(int j = 100; j>=0; j-- ) {
+				if(li.get(j) == Collections.max(li)) {
+					bw.write(j + "\n"); //인덱스를 저장
+				}
+			}
+		}
+		bw.flush();
+		bw.close();
+		br.close();
+	}
+}