HDU 5536: Chip Factory

Posted 2020-10-07

import static java.lang.Math.*;
import java.util.*;

/**
 * @author Sycamore
 * @link http://acm.hdu.edu.cn/showproblem.php?pid=5536
 * @date Sep, 16
 */

public class Main {

    public static void main(String args[]) {
        Scanner scanner =new Scanner(System.in);
        int T=scanner.nextInt();
        while(T--!=0){
            int n=scanner.nextInt(),ans=0;
            int []s=new int[n];
            for(int i=0;i<n;i++){
                s[i]=scanner.nextInt();
            }
            for(int i=0;i<n;i++){
                for(int j=i+1;j<n;j++){
                    for(int k=j+1;k<n;k++){
                        ans=max(ans,(s[i]+s[j])^s[k]);
                        ans=max(ans,(s[i]+s[k])^s[j]);
                        ans=max(ans,(s[j]+s[k])^s[i]);
                    }
                }
            }
            System.out.println(ans);
        }

    }
}

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