#include <stdio.h>

int get_min(int v1, int v2)
{
	if (v1 < v2)
	{
		return v1;

	}
	return v2;

}


int modify_sequence(int *arr, int n)
{
	for (int i = 0; i<n - 1; i++)
	{
		int min_two = get_min(arr[i], arr[i + 1]);

		arr[i] = arr[i] - min_two;
		arr[i + 1] = arr[i + 1] - min_two;
		if (arr[i] != 0)
		{
			return 0;
		}
	}
	if (arr[n - 1] != 0)
	{
		return 0;
	}
	return 1;
}
int main()
{
	int tests;
	scanf("%d", &tests);
	while (tests--)
	{
		int n;
		scanf("%d", &n);
		int arr[10000];
		for (int i = 0; i < n; i++)
		{
			scanf("%d", &arr[i]);
		}

		int res = modify_sequence(arr, n);
		if (res==0)
		{
			printf("NO\n");

		}
		else
		{
			printf("YES\n");
		}


	}

	return 0;
}