1941B - Rudolf and 121 - CodeForces Solution

for _ in range(int(input())):
    n=int(input())
    l1=list(map(int, input().split()))

    for i in range(1, n-1):
        l1[i+1]-=l1[i-1]
        l1[i]-=2*l1[i-1]
        l1[i-1]=0
        if l1[i]<0 or l1[i+1]<0:
            print('NO')
            break
    else:
        if l1[-1]==0 and l1[-2]==0:
            print('YES')
        else:
            print('NO')