[20250925] BOJ / G2 / 연락 / 권혁준

Author: oncsr

khj20006/202509/25 BOJ G2 연락.md

@@ -0,0 +1,97 @@
+```java
+import java.io.*;
+import java.util.*;
+
+class IOController {
+    BufferedReader br;
+    BufferedWriter bw;
+    StringTokenizer st;
+
+    public IOController() {
+        br = new BufferedReader(new InputStreamReader(System.in));
+        bw = new BufferedWriter(new OutputStreamWriter(System.out));
+        st = new StringTokenizer("");
+    }
+
+    String nextLine() throws Exception {
+        String line = br.readLine();
+        st = new StringTokenizer(line);
+        return line;
+    }
+
+    String nextToken() throws Exception {
+        while (!st.hasMoreTokens())
+            nextLine();
+        return st.nextToken();
+    }
+
+    int nextInt() throws Exception {
+        return Integer.parseInt(nextToken());
+    }
+
+    long nextLong() throws Exception {
+        return Long.parseLong(nextToken());
+    }
+
+    double nextDouble() throws Exception {
+        return Double.parseDouble(nextToken());
+    }
+
+    void close() throws Exception {
+        bw.flush();
+        bw.close();
+    }
+
+    void write(String content) throws Exception {
+        bw.write(content);
+    }
+
+}
+
+public class Main {
+
+    static IOController io;
+
+    //
+
+    static int N, M;
+    static int[] r;
+    static long[] f, m;
+
+    static int f(int x) {return x==r[x] ? x : (r[x]=f(r[x]));}
+
+    public static void main(String[] args) throws Exception {
+
+        io = new IOController();
+
+        N = io.nextInt();
+        M = io.nextInt();
+        r = new int[N+1];
+        f = new long[N+1];
+        m = new long[N+1];
+        for(int i=1;i<=N;i++) {
+            if(io.nextInt()%2 == 0) f[i] = 1;
+            else m[i] = 1;
+            r[i] = i;
+        }
+
+        long ans = 0;
+        while(M-->0) {
+            int x = f(io.nextInt());
+            int y = f(io.nextInt());
+            if(x != y) {
+                ans += f[x] * m[y] + f[y] * m[x];
+                f[y] += f[x];
+                m[y] += m[x];
+                r[x] = y;
+            }
+            io.write(ans + "\n");
+        }
+
+
+        io.close();
+
+    }
+
+}
+```