PA - Java reading hint

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.StringTokenizer;

public class SumTest {

    public static void main(String[] args) {
        MyScanner sc = new MyScanner();
        int sum = 0;
        int N = sc.nextInt();
        for (int i = 0; i < N; i++) {
            sum += sc.nextInt();
        }
        System.out.println(sum);
    }

}

// Folositi clasa aceasta pentru o citire mai rapida
// sursa: http://codeforces.com/blog/entry/7018
class MyScanner {
    BufferedReader br;
    StringTokenizer st;

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

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

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

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

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

    String nextLine(){
        String str = "";
        try {
            str = br.readLine();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return str;
    }
}