Codeforces Template

    import java.io.*;
    import java.util.StringTokenizer;

    public class CodeforcesTemplate {
        public static void main(String[] args) throws IOException {
            FastScanner in = new FastScanner();
        }

        public static class FastScanner {
            BufferedReader br;
            StringTokenizer st;

            public FastScanner(String s) {
                try {
                    br = new BufferedReader(new FileReader(s));
                } catch (FileNotFoundException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }

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

            String nextToken() {
                while (st == null || !st.hasMoreElements()) {
                    try {
                        st = new StringTokenizer(br.readLine());
                    } catch (IOException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }
                }
                return st.nextToken();
            }

            String nextLine() {
                st = null;
                try {
                    return br.readLine();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
                return null;
            }

            int nextInt() {
                return Integer.parseInt(nextToken());
            }

            long nextLong() {
                return Long.parseLong(nextToken());
            }

            double nextDouble() {
                return Double.parseDouble(nextToken());
            }
        }
    }