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XoringNinja.java
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29 lines (28 loc) · 745 Bytes
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import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;
public class Solution {
public static void main(String[] args) {
Scanner sc=new Scanner(System.in);
int t=sc.nextInt();
while(t--!=0){
int n=sc.nextInt();
int a[]=new int[n];
for(int i=0;i<n;i++)
a[i]=sc.nextInt();
int xor=0;
int m=1000000007;
for(int i=0;i<n;i++){
int x=a[i];
xor=(xor%m+x%m)%m;
for(int j=i+1;j<n;j++){
x=x^a[j];
xor=(xor%m+x%m)%m;
}
}
System.out.println(xor);
}
}
}