Submission #32780461

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Source Code Expand

import java.io.OutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.FileNotFoundException;
import java.util.ArrayList;
import java.util.List;
import java.util.StringTokenizer;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.InputStream;

/**
 * Built using CHelper plug-in
 * Actual solution is at the top
 */
public class Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        FastScanner in = new FastScanner(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        DBridges solver = new DBridges();
        solver.solve(1, in, out);
        out.close();
    }

    static class DBridges {
        List<Edge>[] graph;
        int[] color;
        boolean[] ans;

        void dfs(int u, Edge parEdge) {
            color[u] = 1;
            for (int t = 0; t < graph[u].size(); t++) {
                Edge e = graph[u].get(t);
                if (e == parEdge) {
                    continue;
                }
                int v = e.from + e.to - u;
                if (color[v] == 0) {
                    ans[e.id] = e.from == u;
                    dfs(v, e);
                } else if (color[v] == 1) {
                    ans[e.id] = e.from == u;
                }
            }
            color[u] = 2;
        }

        public void solve(int testNumber, FastScanner in, PrintWriter out) {
            int n = in.nextInt(), m = in.nextInt();
            int[] a = in.nextIntArray(m), b = in.nextIntArray(m);

            graph = Utils.listArray(n);
            for (int i = 0; i < m; i++) {
                a[i]--;
                b[i]--;
                Edge e = new Edge(a[i], b[i], i);
                graph[a[i]].add(e);
                graph[b[i]].add(e);
            }
            color = new int[n];
            ans = new boolean[m];
            for (int i = 0; i < n; i++) {
                if (color[i] == 0) {
                    dfs(i, null);
                }
            }
            for (boolean bit : ans) {
                out.print(bit ? 0 : 1);
            }
            out.println();
        }

        class Edge {
            int from;
            int to;
            int id;

            public Edge(int from, int to, int id) {
                this.from = from;
                this.to = to;
                this.id = id;
            }

        }

    }

    static class Utils {
        public static <T> List<T>[] listArray(int size) {
            List<T>[] result = new List[size];
            for (int i = 0; i < size; i++) {
                result[i] = new ArrayList<>();
            }
            return result;
        }

    }

    static class FastScanner {
        public BufferedReader br;
        public StringTokenizer st;

        public FastScanner(InputStream in) {
            br = new BufferedReader(new InputStreamReader(in));
        }

        public FastScanner(String fileName) {
            try {
                br = new BufferedReader(new FileReader(fileName));
            } catch (FileNotFoundException e) {
                e.printStackTrace();
            }
        }

        public int nextInt() {
            return Integer.parseInt(next());
        }

        public String next() {
            while (st == null || !st.hasMoreElements()) {
                String line = null;
                try {
                    line = br.readLine();
                } catch (IOException e) {
                    throw new UnknownError();
                }
                if (line == null) {
                    throw new UnknownError();
                }
                st = new StringTokenizer(line);
            }
            return st.nextToken();
        }

        public int[] nextIntArray(int n) {
            int[] ret = new int[n];
            for (int i = 0; i < n; i++) {
                ret[i] = nextInt();
            }
            return ret;
        }

    }
}

Submission Info

Compile Error

Note: ./Main.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.

Judge Result