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import java.util.*; import java.io.*; public class TopologicalSortExample { static BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); static StringTokenizer st; public static void main(String[] args) throws IOException { // Step 1: Initialize adjacency list and in-degree array List<Integer>[] adj = new ArrayList[8]; // Adjacency list for graph (1-indexed) for (int i = 1; i <= 7; i++) { adj[i] = new ArrayList<>(); } // TODO: remaining logic } // Helper methods for input handling static String next() throws IOException { while (st == null || !st.hasMoreTokens()) st = new StringTokenizer(br.readLine().trim()); return st.nextToken(); } static int readInt() throws IOException { return Integer.parseInt(next()); } }
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