[20250214] BOJ / G3 / 행성 X3 / 권혁준

Author: oncsr

khj20006/202502/14 BOJ G3 행성 X3.md

@@ -0,0 +1,54 @@
+```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;
+
+	static void nextLine() throws Exception {st = new StringTokenizer(br.readLine());}
+	static int nextInt() {return Integer.parseInt(st.nextToken());}
+	static long nextLong() {return Long.parseLong(st.nextToken());}
+	static void bwEnd() throws Exception {bw.flush();bw.close();}
+	
+	// Additional field
+	static long ans = 0;
+	static long[] cnt;
+	static long N;
+	
+	public static void main(String[] args) throws Exception {
+		
+		ready();
+		solve();
+	
+		bwEnd();
+		
+	}
+	
+	static void ready() throws Exception{
+
+		cnt = new long[20];
+		N = Integer.parseInt(br.readLine());
+		for(int i=0;i<N;i++) {
+			int a = Integer.parseInt(br.readLine());
+			for(int j=0;j<20;j++) if((a & (1<<j)) != 0) cnt[j]++;
+		}
+		
+	}
+	
+	static void solve() throws Exception{
+		
+		for(int i=0;i<20;i++) {
+			ans += (N-cnt[i]) * cnt[i] * (1<<i);
+		}
+		bw.write(ans+"\n");
+		
+	}
+	
+}
+
+```