#include <bits/stdc++.h>
#define ent '\n'
#define  f first
#define s second
#define int long long
#define sz(x) (int)(x).size()
#define rep(i, a, b) for(int i = a; i < (b); ++i)

using namespace std;
typedef long long ll;
typedef vector<int> vi;
const int maxn = 2e5 + 12;
const int mod = 1e9 + 7;

int a[maxn];
int b[maxn];
int n, m, k;

int solve(int a[], int x, int y){
    int ans = 0;
    for(int i=1;i<=n;i++){
        if(a[i] == x){
            swap(x, y);
            continue;
        }
        ans++;
        if(a[i] == y){
            int j = i;
            while(j < n && a[j+1] == x + y - a[j]){
                j++;
            }
            ans += (j - i) / 2 + j - i + 1;
            for(int l=i;l<=j;l++){
                a[l] = x + y - a[l];
                swap(x, y);
            }
            continue;
        }
        if(a[i+1] == x){
            int j = i+1;
            while(j < n && a[j+1] == x + y - a[j]){
                j++;
            }
            ans += (j - i - 1) / 2 + j - i;
            for(int l=i+1;l<=j;l++){
                a[l] = x + y - a[l];
            }
        }
        a[i] = x;
        swap(x, y);
    }
    return ans;
}

void solve(){
    cin >> n;
    for(int i=1;i<=n;i++){
        cin >> a[i];
    }
    int ans = 2 * n;
    for(int x=1;x<=n+2;x++){
        for(int y=1;y<=n+2;y++){
            if(x == y) continue;
            for(int i=1;i<=n;i++){
                b[i] = a[i];
            }
            ans = min(ans, solve(b, x, y));
        }
    }
    cout << ans << ent;
}

int32_t main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    int t = 1;
    cin >> t;
    while(t--){
        solve();
    }
}