#include <bits/stdc++.h>
#define int long long
typedef long long ll;
using namespace std;
void solve() {
int n;
cin>>n;
vector<int> v(n);
for(int i=0;i<n;i++)cin>>v[i];
int x=0;
int i=0,j=n-1;
while(i<j){
int z=abs(v[i]-v[j]);
cout<<z<<endl;
i++;
j--;
}
}
signed main() {
int t;
cin >> t;
while (t--) {
solve();
}
return 0;
}
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