#include using ll = long long; using namespace std; #define rep(i, s, t) for (ll i = s; i < (ll)(t); i++) #define rrep(i, s, t) for (ll i = (ll)(t) - 1; i >= (ll)(s); i--) #define all(x) begin(x), end(x) #define rall(x) rbegin(x), rend(x) template bool chmin(T& x, T y) { return x > y ? (x = y, true) : false; } template bool chmax(T& x, T y) { return x < y ? (x = y, true) : false; } struct io_setup { io_setup() { ios::sync_with_stdio(false); std::cin.tie(nullptr); cout << fixed << setprecision(15); } } io_setup; #include void solve() { int n; cin>>n; vector a(n); rep(i,0,n) cin>>a[i]; auto press=[&](){ sort(a.begin(),a.end()); return a[0]==a[n-1]; }; vector> ans; while(1){ if(press()) break; ll md=(a[n-1]+a[0])/2; ll ad=a[n-1]-md; rep(i,0,n){ if(a[i]>md){ ans.push_back({0,i,ad}); break; } a[i]+=ad; } } cout<> t; while (t--) solve(); }