#include <cstdlib>
#include <cctype>
#include <cstring>
#include <cstdio>
#include <cmath>
#include <algorithm>
#include <vector>
#include <string>
#include <iostream>
#include <sstream>
#include <map>
#include <set>
#include <queue>
#include <stack>
#include <fstream>
#include <numeric>
#include <iomanip>
#include <bitset>
#include <list>
#include <stdexcept>
#include <functional>
#include <utility>
#include <ctime>
using namespace std;
typedef long long LL;
typedef unsigned long long ULL;
#define MEM(a,b) memset((a),(b),sizeof(a))
const LL INF = 1e9 + 7;
const int N = 2e5 + 10;
int main()
{
	//freopen("input.txt", "r", stdin);
	//freopen("output.txt", "w", stdout);
	int ncase;
	scanf("%d", &ncase);
	while (ncase--)
	{
		vector<int> v;
		int n;
		scanf("%d", &n);
		while (n--)
		{
			int x;
			scanf("%d", &x);
			if (v.empty() || v.back() != x)
				v.push_back(x);
		}
		if (v.size() % 2 == 0)
		{
			puts("Yes");
		}
		else if (v[0] == 1)
		{
			if (v.size() <= 3) puts("No");
			else puts("Yes");
		}
		else
		{
			puts("No");
		}
	}
	return 0;
}