[20250714] BOJ / G4 / 저울 / 이종환

Author: 0224LJH

0224LJH/202507/14 BOJ 저울.md

@@ -0,0 +1,122 @@
+```java
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.util.*;
+
+public class Main {
+    static StringBuilder sb = new StringBuilder();
+    static int stuffCnt,pairCnt;
+    static Stuff[] stuffs;
+    static boolean[][] visited;
+
+
+    static class Stuff implements Comparable<Stuff>{
+        int num;
+        int parentCnt = 0;
+        List<Stuff> parents = new ArrayList<>();
+        List<Stuff> children = new ArrayList<>();
+
+        public Stuff(int num) {
+            this.num = num;
+        }
+
+        @Override
+        public int compareTo(Stuff o) {
+            return o.parentCnt - this.parentCnt;
+        }
+
+        //
+        public void addToChildParentList(int num) {
+            for (Stuff child : children) {
+                if (visited[child.num][num]) continue;
+                visited[child.num][num] = true;
+                child.addToChildParentList(num);
+            }
+        }
+
+        public void addToParentChildList(int num) {
+            for ( Stuff parent : parents) {
+                if (visited[parent.num][num]) continue;
+                visited[parent.num][num] = true;
+                parent.addToParentChildList(num);
+            }
+        }
+    }
+
+
+    public static void main(String[] args) throws IOException {
+        init();
+        process();
+        print();
+    }
+
+    private static void init() throws IOException {
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+        stuffCnt = Integer.parseInt(br.readLine());
+        pairCnt = Integer.parseInt(br.readLine());
+
+        stuffs = new Stuff[stuffCnt+1];
+        visited = new boolean[stuffCnt+1][stuffCnt+1];
+
+        for (int i = 1; i <= stuffCnt; i++) {
+            stuffs[i] = new Stuff(i);
+            visited[i][i] = true;
+        }
+
+        for (int i = 0; i < pairCnt; i++) {
+            StringTokenizer st = new StringTokenizer(br.readLine());
+            int parent = Integer.parseInt(st.nextToken());
+            int child = Integer.parseInt(st.nextToken());
+
+            stuffs[parent].children.add(stuffs[child]);
+            stuffs[child].parents.add(stuffs[parent]);
+            stuffs[child].parentCnt++;
+            visited[parent][child] = true;
+            visited[child][parent] = true;
+        }
+    }
+
+    private static void process() {
+        PriorityQueue<Stuff> pq = new PriorityQueue<>();
+        for (int i = 1; i <= stuffCnt; i++) {
+            pq.add(stuffs[i]);
+        }
+
+        while (!pq.isEmpty()) {
+            Stuff s = pq.poll();
+            int num  = s.num;
+
+            for (Stuff child : s.children) {
+                child.addToChildParentList(num);
+            }
+            for (Stuff parent : s.parents) {
+                parent.addToParentChildList(num);
+            }
+        }
+
+        for (int i = 1; i <= stuffCnt; i++) {
+            int ans = stuffCnt;
+
+            for (int j = 1; j <= stuffCnt; j++) {
+                if (visited[i][j]) ans--;
+            }
+            sb.append(ans).append("\n");
+        }
+
+
+    }
+
+
+
+
+    private static void print()  {
+        System.out.println(sb.toString());
+    }
+
+
+
+}
+
+```