def con():
    t=int(input())
    for i in range(t)         :
        a=list()
        b=list()
        n= int( input() )
        ch1=input()
        a=[ int(j) for j in ch1.split() ]
        ch2=input()
        b=[int(j) for j in ch2.split()]
        if ch1==ch2:
            print("YES")
            continue
        k=0
        B=True
        while((B==True)and(k<n))     :
            if  a[k]>b[k]     :
                B=False
            elif a[k]<b[k]    :
                tmp=b[k]-a[k]
                v=k
                B1=True
                while(B1==True)    :
                    if ((b[v]==tmp+a[v])) :
                        v=v+1
                    else :
                        k=v
                        B1=False
                        for l in range(k,n):
                            if ( a[l] == b[l] ):
                                continue
                            else:
                                B=False
            else:
                k=k+1
        if (B==True ):
                    print("YES")
        else :
                    print("NO")

con()