xlQNxd - Online C++ Compiler & Debugging Tool

#include <bits/stdc++.h>
#define pii pair<int,int>
#define fi first
#define int long long
#define se second
#define ios ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
#define op freopen
#define TXT "test"
#define freo if(fopen(TXT".inp","r")){op(TXT".inp","r",stdin);op(TXT".out","w",stdout);}

using namespace std;

int n,a[1005],t;

void solve()
{
    cin>>n;
    for(int i=1;i<=n;i++)
    {
        cin>>a[i];
    }
    bool OK=0;
    for(int i=1;i<n;i++)
    {
        if(a[i]==0&&a[i+1]==0)
        {
            cout<<"YES\n";
            return;
        }
        if(a[i]==0&&a[i+1]==1)
        {
            OK=1;
        }
        if(a[i]==1&&a[i+1]==0)
        {
            OK=0;
        }
        if(a[i]==1&&a[i+1]==1)
        {
            if(!OK)
            {
                cout<<"YES\n";
                return;
            }
        }
    }
    cout<<"NO\n";
}
main()
{
    ios;
    freo;
    cin>>t;
    while(t--)
        solve();
}