[20250818] BOJ / G2 / 칵테일 / 이종환

0224LJH/202508/18 BOJ 칵테일 .md

@@ -0,0 +1,187 @@
+```java
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Queue;
+import java.util.StringTokenizer;
+
+
+public class Main {
+    static int nodeCnt;
+    static Node[] nodes;
+    static Queue<Edge> q =  new LinkedList<>();
+    static HashSet<Node> visited = new HashSet<>();
+
+    static class Node{
+        int idx;
+        int num;
+
+        List<Node> list = new ArrayList<>();
+
+        public Node(int idx){
+            this.idx = idx;
+        }
+
+        public void propagate(int weight){
+            visited.add(this);
+            num *=  weight;
+
+            for (Node node : list){
+                if (visited.contains(node)) continue;
+                node.propagate(weight);
+            }
+        }
+    }
+
+    static class Edge{
+        int from;
+        int to;
+        int fromWeight;
+        int toWeight;
+
+        public Edge(int from, int to, int fromWeight, int toWeight){
+            this.from = from;
+            this.to = to;
+            this.fromWeight = fromWeight;
+            this.toWeight = toWeight;
+        }
+    }
+
+
+
+
+    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));
+        nodeCnt = Integer.parseInt(br.readLine());
+        nodes = new Node[nodeCnt];
+
+        for (int i = 0 ; i < nodeCnt -1; i++){
+            StringTokenizer st = new StringTokenizer(br.readLine());
+
+            int from = Integer.parseInt(st.nextToken());
+            int to = Integer.parseInt(st.nextToken());
+            int fromWeight = Integer.parseInt(st.nextToken());
+            int toWeight = Integer.parseInt(st.nextToken());
+
+            q.add(new Edge(from,to,fromWeight,toWeight));
+
+        }
+
+
+    }
+
+    private static void process() throws IOException {
+        firstSetting();
+        makeNums();
+
+        int gcd = euclid();
+
+        for (int i = 0; i < nodeCnt; i++){
+            nodes[i].num /= gcd;
+        }
+
+
+
+        for (int i = 0 ; i< nodeCnt ; i++){
+            System.out.print(nodes[i].num + " ");
+        }
+
+
+    }
+
+    private static int euclid() {
+        int gcd = nodes[0].num;
+        int large,small;
+
+        for (int i = 1; i < nodeCnt; i++){
+
+
+            int target = nodes[i].num;
+
+            if (gcd < target) {
+                large = target;
+                small = gcd;
+            } else if (gcd > target) {
+                large = gcd;
+                small = target;
+            } else continue;
+
+            while(true){
+                int remainder = large%small;
+                if (remainder == 0){
+                    gcd = small;
+                    break;
+                }
+
+                large = small;
+                small = remainder;
+            }
+        }
+
+        return gcd;
+    }
+
+    private static void makeNums() {
+        while(!q.isEmpty()){
+            Edge e = q.poll();
+
+            if (nodes[e.from] == null &&  nodes[e.to] == null) {
+                q.offer(e);
+                continue;
+            }
+
+            visited = new HashSet<>();
+
+            if (nodes[e.from] == null) {
+
+                nodes[e.from] = new Node(e.from);
+                nodes[e.from].num = e.fromWeight * nodes[e.to].num;
+                nodes[e.from].list.add(nodes[e.to]);
+                nodes[e.to].list.add(nodes[e.from]);
+
+                visited.add(nodes[e.from]);
+                nodes[e.to].propagate(e.toWeight);
+
+            } else{
+                nodes[e.to] = new Node(e.to);
+                nodes[e.to].num = e.toWeight * nodes[e.from].num;
+                nodes[e.to].list.add(nodes[e.from]);
+                nodes[e.from].list.add(nodes[e.to]);
+
+                visited.add(nodes[e.to]);
+
+                nodes[e.from].propagate(e.fromWeight);
+            }
+        }
+    }
+
+    private static void firstSetting() {
+        Edge first = q.poll();
+
+        nodes[first.from] = new Node(first.from);
+        nodes[first.from].num = first.fromWeight;
+
+        nodes[first.to] = new Node(first.to);
+        nodes[first.to].num = first.toWeight;
+
+        nodes[first.from].list.add(nodes[first.to]);
+        nodes[first.to].list.add(nodes[first.from]);
+
+    }
+
+
+    private static void print() {
+
+    }
+}
+```