Codeforces Round #344 (Div. 2) A. Interview

//http://codeforces.com/contest/631/problem/A
package codeforces344;

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

/**
 * Created by lenovo on 2016-03-10.
 */
public class A344 {
    BufferedReader br;
    PrintWriter out;
    StringTokenizer st;
    boolean eof;

    void solve() throws IOException {
        int n = nextInt();
        int[] a = new int[1000 + 10];
        int[] b = new int[1000 + 10];
        for(int i = 0; i < n; ++i) {
            a[i] = nextInt();
        }
        for(int i = 0; i < n; ++i) {
            b[i] = nextInt();
        }

        long max = -1;
        for(int i = 0; i < n; ++i) {
            for(int j = 0; j < n; ++j){
                max = Math.max(max, f(a, b, i, j));
            }
        }
        System.out.println(max);
    }

    long f(int[] a, int[] b, int i, int j) {
        int va = a[i];
        int vb = b[i];
        for(int ii = i; ii <= j; ++ii){
            va = va | a[ii];
            vb = vb | b[ii];
        }
        //System.out.println("va + vb " + va + vb);
        return va + vb;
    }

    A344() throws IOException {
        br = new BufferedReader(new InputStreamReader(System.in));
        out = new PrintWriter(System.out);
        solve();
        out.close();
        br.close();
    }
    public static void main(String[] args) throws  IOException{
        new A344();
    }
    String nextToken(){
        while(st == null || !st.hasMoreTokens()){
            try{
                st = new StringTokenizer(br.readLine());
            } catch(IOException e) {
                eof = true;
                return null;
            }
        }
        return st.nextToken();
    }

    String nextString(){
        try{
            return br.readLine();
        } catch (Exception e) {
            eof = true;
            return null;
        }
    }

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

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

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

　　

水题异常的好刷 T_T