Main.java

package DP.P9465;

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

public class Main {

    static int T, n;
    static int[][] sticker, dp;

    public static void main(String[] args) throws Exception {
        System.setIn(new FileInputStream("src/DP/P9465/input.txt"));
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

        T = Integer.parseInt(br.readLine());
        while (T-- > 0) {
            n = Integer.parseInt(br.readLine());
            sticker = new int[2][n+1];
            for (int i = 0; i < 2; i++) {
                StringTokenizer st = new StringTokenizer(br.readLine());
                for (int j = 1; j <= n; j++) {
                    sticker[i][j] = Integer.parseInt(st.nextToken());
                }
            }

            dp = new int[2][n+1];
            dp[0][1] = sticker[0][1];
            dp[1][1] = sticker[1][1];
            for (int i = 2; i <= n; i++) {
                dp[0][i] = Math.max(dp[1][i-1], dp[1][i-2]) + sticker[0][i];
                dp[1][i] = Math.max(dp[0][i-1], dp[0][i-2]) + sticker[1][i];
            }

            System.out.println(Math.max(dp[0][n], dp[1][n]));
        }
    }
}