[20250611] BOJ / G3 / ACM Craft / 김수연

suyeun84/202506/11 BOJ G3 ACM Craft.md

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+```java
+import java.util.*;
+import java.io.*;
+
+public class boj1005 {
+	static BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+	static StringTokenizer st;
+	static void nextLine() throws Exception {st = new StringTokenizer(br.readLine());}
+	static int nextInt() {return Integer.parseInt(st.nextToken());}
+
+	public static void main(String[] args) throws Exception {
+		nextLine();
+		int T = nextInt();
+		for (int tc = 0; tc < T; tc++) {
+			nextLine();
+			int N = nextInt(); // 건물 개수 (1~N)
+			int K = nextInt(); // 건설순서 규칙의 개수
+			int[] time = new int[N+1]; // 건물당 걸리는 시간
+			int[] answer = new int[N+1];
+			int[] degree = new int[N+1];
+			ArrayList<ArrayList<Integer>> graph = new ArrayList<>();
+			for (int i = 0; i <= N; i++) graph.add(new ArrayList<Integer>());
+			nextLine();
+			for (int i = 1; i <= N; i++) time[i] = nextInt();
+			for (int i = 0; i < K; i++) {
+				nextLine();
+				int a = nextInt();
+				int b = nextInt();
+				graph.get(a).add(b); // 건물 a -> b
+				degree[b]++;
+			}
+			nextLine();
+			int W = nextInt(); // 승리하기 위해 건설해야 할 건물 번호
+
+			Queue<Integer> q = new LinkedList<>();
+			for (int i = 1; i <= N; i++) {
+				if (degree[i] == 0) {
+					q.add(i);
+					answer[i] = time[i];
+				}
+			}
+			while (!q.isEmpty()) {
+				int cur = q.poll();
+				for (int next : graph.get(cur)) {
+					answer[next] = Math.max(answer[next], answer[cur] + time[next]);
+					degree[next]--;
+					if (degree[next] == 0) q.add(next);
+				}
+			}
+			System.out.println(answer[W]);
+		}
+	}
+}
+```