diff --git a/khj20006/202503/20 BOJ G1 Lottery for Vitcoins at Moloco (Hard).md b/khj20006/202503/20 BOJ G1 Lottery for Vitcoins at Moloco (Hard).md
new file mode 100644
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+++ b/khj20006/202503/20 BOJ G1 Lottery for Vitcoins at Moloco (Hard).md	
@@ -0,0 +1,64 @@
+```java
+
+import java.util.*;
+import java.io.*;
+
+class Main {
+	
+	// IO field
+	static BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+	static BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
+	static StringTokenizer st = new StringTokenizer("");
+
+	static void nextLine() throws Exception {st = new StringTokenizer(br.readLine());}
+	static String nextToken() throws Exception {
+		if(!st.hasMoreTokens()) nextLine();
+		return st.nextToken();
+	}
+	static int nextInt() throws Exception { return Integer.parseInt(nextToken()); }
+	static long nextLong() throws Exception { return Long.parseLong(nextToken()); }
+	static double nextDouble() throws Exception { return Double.parseDouble(nextToken()); }
+	static void bwEnd() throws Exception {bw.flush();bw.close();}
+	
+	// Additional field
+	
+	static int N;
+	static int[][] A;
+	
+	public static void main(String[] args) throws Exception {
+		
+		ready();
+		solve();
+	
+		bwEnd();
+		
+	}
+	
+	static void ready() throws Exception{
+		
+		N = nextInt();
+		A = new int[N][3];
+		for(int i=0;i<N;i++) {
+			A[i][0] = nextInt();
+			A[i][1] = nextInt();
+			A[i][2] = i+1;
+		}
+		
+	}
+	
+	static void solve() throws Exception{
+
+		Arrays.sort(A, (a,b) -> {
+			int resA = (10000-a[1])*a[0] + (a[0]+b[0])*a[1];
+			int resB = (10000-b[1])*b[0] + (a[0]+b[0])*b[1];
+			if(resA > resB) return -1;
+			if(resA < resB) return 1;
+			return a[2]-b[2];
+		});
+		for(int[] i:A) bw.write(i[2] + " ");
+		
+	}
+	
+}
+
+```