One_To_Three.cpp

#include <iostream>

#include <bits/stdc++.h>

#include <algorithm>

#include <vector>

#include <stdlib.h>

#include <time.h>

using namespace std;
#define optimize()\
ios_base::sync_with_stdio(0);\
cin.tie(0);\
cout.tie(0);
#define fraction()\
cout.unsetf(ios::floatfield);\
cout.precision(10);\
cout.setf(ios::fixed, ios::floatfield);
#define file()\
freopen("input.txt", "r", stdin);\
freopen("output.txt", "w", stdout);

typedef long long ll;
typedef vector < int > vi;
typedef vector < ll > vl;
typedef vector < vi > vvi;
typedef vector < vl > vvl;
typedef pair < int, int > pii;
typedef pair < double, double > pdd;
typedef pair < ll, ll > pll;
typedef vector < pii > vii;
typedef vector < pll > vll;
typedef double dl;
#define endl '\n'
#define PB push_back
#define coy cout << "YES" << endl;
#define con cout << "NO" << endl;
#define ain(A, NN)\
for (ll I = 0; I < NN; I++)\
    cin >> A[I]
using namespace std;

int main()
{
    optimize();

    int t;
    cin >> t;
    while (t--) {
        ll n;
        cin >> n;

        vl a(n);
        for (int i = 0; i < n; i++) {
            cin >> a[i];
        }


        bool flag = true;

        while (flag) {
            flag = false;
            for (int i = 1; i < n - 1; i++) {
                if ((a[i - 1] + a[i + 1] == 4)) {

                    ll b = 4 - a[i];

                    if(b<a[i])
                    {
                        a[i]=b;
                        flag=true;
                    }
                }
            }
        }




        ll s = accumulate(a.begin(), a.end(), 0LL);
        cout << s << endl;
    }

    return 0;
}