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- #include<bits/stdc++.h>
- using namespace std;
- #define lli long long int
- struct info{
- lli s, f;
- };
- lli a[100009];
- int main()
- {
- lli n,t;
- cin>>t;
- while(t--){
- map<lli,info> m;
- cin>>n;
- for(int i=0;i<n;++i){
- cin>>a[i];
- }
- m[0].s = 0;
- m[0].f = 1;
- lli x = 0;
- lli c = 0;
- for(int i=0;i<n;++i){
- x = x xor a[i];
- map<lli,info>::iterator itr = m.find(x);
- if(itr==m.end()){
- m[x].s = i+1;
- m[x].f = 1;
- }
- else{
- c += abs(m[x].s-m[x].f*i);
- m[x].s += i+1;
- m[x].f++;
- }
- }
- cout<<c<<endl;
- }
- }
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