[20250907] BOJ / G2 / 집 구하기 / 김민진

zinnnn37/202509/7 BOJ G2 집 구하기.md

@@ -0,0 +1,130 @@
+```java
+import java.io.*;
+import java.util.*;
+
+public class BJ_13911_집_구하기 {
+
+	private static final long INF = 9876543210L;
+
+	private static final BufferedReader  br = new BufferedReader(new InputStreamReader(System.in));
+	private static final BufferedWriter  bw = new BufferedWriter(new OutputStreamWriter(System.out));
+	private static       StringTokenizer st;
+
+	private static int V, E;
+	private static int M, x;
+	private static int S, y;
+
+	private static long[]    mcdonalds;
+	private static long[]    starbucks;
+	private static boolean[] isMcdonalds;
+	private static boolean[] isStarbucks;
+
+	private static Queue<Node>  pq;
+	private static List<Node>[] graph;
+
+	private static class Node implements Comparable<Node> {
+		int  from;
+		int  to;
+		long dist;
+
+		Node(int from, int to, long dist) {
+			this.from = from;
+			this.to   = to;
+			this.dist = dist;
+		}
+
+		@Override
+		public int compareTo(Node o) {
+			return Long.compare(this.dist, o.dist);
+		}
+	}
+
+	public static void main(String[] args) throws IOException {
+		init();
+		sol();
+	}
+
+	private static void init() throws IOException {
+		st = new StringTokenizer(br.readLine());
+		V  = Integer.parseInt(st.nextToken());
+		E  = Integer.parseInt(st.nextToken());
+
+		graph = new List[V + 1];
+		for (int i = 1; i <= V; i++) {
+			graph[i] = new ArrayList<>();
+		}
+
+		for (int i = 1; i <= E; i++) {
+			st = new StringTokenizer(br.readLine());
+
+			int from   = Integer.parseInt(st.nextToken());
+			int to     = Integer.parseInt(st.nextToken());
+			int weight = Integer.parseInt(st.nextToken());
+
+			graph[from].add(new Node(from, to, weight));
+			graph[to].add(new Node(to, from, weight));
+		}
+
+		mcdonalds   = new long[V + 1];
+		starbucks   = new long[V + 1];
+		isMcdonalds = new boolean[V + 1];
+		isStarbucks = new boolean[V + 1];
+
+		pq = new PriorityQueue<>();
+	}
+
+	private static void sol() throws IOException {
+		// Multisource Dijkstra
+		st = new StringTokenizer(br.readLine());
+		M  = Integer.parseInt(st.nextToken());
+		x  = Integer.parseInt(st.nextToken());
+		dijkstra(mcdonalds, isMcdonalds, M);
+
+		// Multisource Dijkstra
+		st = new StringTokenizer(br.readLine());
+		S  = Integer.parseInt(st.nextToken());
+		y  = Integer.parseInt(st.nextToken());
+		dijkstra(starbucks, isStarbucks, S);
+
+		long ans = INF;
+		for (int i = 1; i <= V; i++) {
+			if (!isMcdonalds[i] && !isStarbucks[i] && mcdonalds[i] <= x && starbucks[i] <= y) {
+				ans = Math.min(ans, mcdonalds[i] + starbucks[i]);
+			}
+		}
+		bw.write((ans == INF ? -1 : ans) + "");
+		bw.flush();
+		bw.close();
+		br.close();
+	}
+
+	private static void dijkstra(long[] dist, boolean[] isStore, int cnt) throws IOException {
+		pq.clear();
+		Arrays.fill(dist, INF);
+
+		st = new StringTokenizer(br.readLine());
+		for (int i = 0; i < cnt; i++) {
+			int start = Integer.parseInt(st.nextToken());
+			isStore[start] = true;
+			dist[start]    = 0;
+			pq.offer(new Node(start, start, 0));
+		}
+
+		while (!pq.isEmpty()) {
+			Node cur = pq.poll();
+
+			if (cur.dist > dist[cur.to]) continue;
+
+			for (Node n : graph[cur.to]) {
+				long nDist = dist[cur.to] + n.dist;
+
+				if (nDist < dist[n.to]) {
+					dist[n.to] = nDist;
+					pq.offer(new Node(n.from, n.to, nDist));
+				}
+			}
+		}
+	}
+
+}
+```