diff --git a/Ukj0ng/202509/6 BOJ G3 A Bug's Life.md b/Ukj0ng/202509/6 BOJ G3 A Bug's Life.md new file mode 100644 index 00000000..90715311 --- /dev/null +++ b/Ukj0ng/202509/6 BOJ G3 A Bug's Life.md @@ -0,0 +1,78 @@ +``` +import java.io.*; +import java.util.*; + +public class Main { + private static final BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); + private static final BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out)); + private static List[] graph; + private static int[] visited; + private static int N, M; + + public static void main(String[] args) throws IOException { + int T = Integer.parseInt(br.readLine()); + + for (int i = 1; i <= T; i++) { + init(); + boolean result = true; + + for (int ii = 1; ii <= N; ii++) { + if (visited[ii] == 0) { + result = BFS(ii); + } + + if (!result) break; + } + + bw.write(String.format("Scenario #%d:\n", i)); + if (result) bw.write("No suspicious bugs found!\n\n"); + else bw.write("Suspicious bugs found!\n\n"); + } + + bw.flush(); + bw.close(); + br.close(); + } + + private static void init() throws IOException { + StringTokenizer st = new StringTokenizer(br.readLine()); + N = Integer.parseInt(st.nextToken()); + M = Integer.parseInt(st.nextToken()); + + graph = new List[N+1]; + visited = new int[N+1]; + + for (int i = 1; i <= N; i++) { + graph[i] = new ArrayList<>(); + } + + for (int i = 0; i < M; i++) { + st = new StringTokenizer(br.readLine()); + int a = Integer.parseInt(st.nextToken()); + int b = Integer.parseInt(st.nextToken()); + + graph[a].add(b); + graph[b].add(a); + } + } + + private static boolean BFS(int start) { + Queue q = new ArrayDeque<>(); + visited[start] = 1; + q.add(start); + + while (!q.isEmpty()) { + int current = q.poll(); + + for (int next : graph[current]) { + if (visited[next] == 0) { + visited[next] = 3 - visited[current]; + q.add(next); + } else if (visited[next] == visited[current]) return false; + } + } + + return true; + } +} +```