n=int(input())
a=list(map(int,input().split()))

B=317
st1=[(0,0,0,0)]*B*B
st2=[(0,0,0,0)]*B
lt=[0]*B

def op(x,y):
  x1,x2,x3,x4=x
  y1,y2,y3,y4=y
  z1=x1+y1
  z2=max(x1,x2)+y2
  z3=max(x1,x2,x3)+y3
  z4=max(x1,x2,x3,x4)+y4
  z=(z1,z2,z3,z4)
  return z

def mp(f,x):
  match f:
    case 0:
      return x
    case 1:
      return (1,0,0,0)
    case 2:
      return (0,1,0,0)
    case 3:
      return (0,0,1,0)
    case 4:
      return (0,0,0,1)
  return

def cp(f,g):
  return g

for i in range(n):
  st1[i]=mp(a[i],st1[i])
for i in range(B):
  for j in range(i*B,i*B+B):
    st2[i]=op(st2[i],st1[j])

Q=int(input())
for _ in range(Q):
  query=list(map(int,input().split()))
  t=query[0]
  if t==1:
    _,l,r=query
    l-=1
    r-=1
    yl=l//B
    yr=r//B
    for i in range(yl*B,yl*B+B):
      st1[i]=mp(lt[yl],st1[i])
    lt[yl]=0
    for i in range(yr*B,yr*B+B):
      st1[i]=mp(lt[yr],st1[i])
    lt[yr]=0
    a=(0,0,0,0)
    if yl==yr:
      for i in range(l,r+1):
        a=op(a,st1[i])
    else:
      for i in range(l,yl*B+B):
        a=op(a,st1[i])
      for i in range(yl+1,yr):
        a=op(a,st2[i])
      for i in range(yr*B,r+1):
        a=op(a,st1[i])
    a1,a2,a3,a4=a
    print(max(a1,a2,a3,a4))
  else:
    _,l,r,x=query
    l-=1
    r-=1
    yl=l//B
    yr=r//B
    for i in range(yl*B,yl*B+B):
      st1[i]=mp(lt[yl],st1[i])
    lt[yl]=0
    for i in range(yr*B,yr*B+B):
      st1[i]=mp(lt[yr],st1[i])
    lt[yr]=0
    if yl==yr:
      for i in range(l,r+1):
        st1[i]=mp(x,st1[i])
      for i in range(yl*B,yl*B+B):
        st2[yl]=op(st2[yl],st1[i])
    else:
      for i in range(l,yl*B+B):
        st1[i]=mp(lt[yl],st1[i])
      for i in range(yl*B,yl*B+B):
        st2[yl]=op(st2[yl],st1[i])
      for i in range(yl+1,yr):
        match x:
          case 1:
            st2[i]=(B,0,0,0)
          case 2:
            st2[i]=(0,B,0,0)
          case 3:
            st2[i]=(0,0,B,0)
          case 4:
            st2[i]=(0,0,0,B)
        lt[i]=x
      for i in range(yr*B,r+1):
        st1[i]=mp(lt[yr],st1[i])
      for i in range(yr*B,yr*B+B):
        st2[yr]=op(st2[yr],st1[i])