結果
| 問題 | No.1027 U+1F4A0 |
| ユーザー |
 ikom
|
| 提出日時 | 2020-04-17 21:47:26 |
| 言語 | Fortran (gFortran 13.2.0) |
| 結果 |
AC
|
| 実行時間 | 1 ms / 2,000 ms |
| コード長 | 33,007 bytes |
| コンパイル時間 | 2,144 ms |
| コンパイル使用メモリ | 39,936 KB |
| 実行使用メモリ | 5,248 KB |
| 最終ジャッジ日時 | 2024-10-03 11:58:40 |
| 合計ジャッジ時間 | 2,971 ms |
|
ジャッジサーバーID （参考情報） |
judge3 / judge2 |
（要ログイン）
テストケース
テストケース表示| 入力 | 結果 | 実行時間 実行使用メモリ |
|---|---|---|
| testcase_00 | AC | 1 ms
5,248 KB |
| testcase_01 | AC | 1 ms
5,248 KB |
| testcase_02 | AC | 1 ms
5,248 KB |
| testcase_03 | AC | 1 ms
5,248 KB |
| testcase_04 | AC | 1 ms
5,248 KB |
| testcase_05 | AC | 1 ms
5,248 KB |
| testcase_06 | AC | 1 ms
5,248 KB |
| testcase_07 | AC | 1 ms
5,248 KB |
| testcase_08 | AC | 1 ms
5,248 KB |
| testcase_09 | AC | 1 ms
5,248 KB |
| testcase_10 | AC | 1 ms
5,248 KB |
| testcase_11 | AC | 1 ms
5,248 KB |
| testcase_12 | AC | 1 ms
5,248 KB |
| testcase_13 | AC | 1 ms
5,248 KB |
| testcase_14 | AC | 1 ms
5,248 KB |
| testcase_15 | AC | 1 ms
5,248 KB |
| testcase_16 | AC | 1 ms
5,248 KB |
| testcase_17 | AC | 1 ms
5,248 KB |
| testcase_18 | AC | 1 ms
5,248 KB |
| testcase_19 | AC | 1 ms
5,248 KB |
| testcase_20 | AC | 1 ms
5,248 KB |
| testcase_21 | AC | 1 ms
5,248 KB |
| testcase_22 | AC | 1 ms
5,248 KB |
| testcase_23 | AC | 1 ms
5,248 KB |
ソースコード
module module_sort
implicit none
interface sort
module procedure int_heap_sort, real_heap_sort
end interface
contains
subroutine int_heap_down(a,node,las)
implicit none
integer(8) a(*),x
integer(8) node,par,ch1,ch2,las
par = node
x = a(par); ch1 = par*2
do while(ch1 <= las)
ch2 = ch1+1
if(ch2 <= las .and. a(ch1) < a(ch2)) ch1 = ch2
if(a(ch1) > x) then
a(par) = a(ch1); a(ch1) = x
else
exit
end if
par = ch1; ch1 = par*2
end do
end subroutine int_heap_down
subroutine int_heap_sort(a,n)
implicit none
integer(8) a(*),x
integer(8) n,i
do i = n/2, 1, -1
call int_heap_down(a,i,n)
end do
do i=n,2,-1
x = a(i); a(i) = a(1); a(1) = x
call int_heap_down(a,1_8,i-1)
end do
end subroutine int_heap_sort
subroutine real_heap_down(a,node,las)
implicit none
real a(*), x
integer(8) node,par,ch1,ch2,las
par = node
x = a(par); ch1 = par*2
do while(ch1 <= las)
ch2 = ch1+1
if(ch2 <= las .and. a(ch1) < a(ch2)) ch1 = ch2
if(a(ch1) > x) then
a(par) = a(ch1); a(ch1) = x
else
exit
end if
par = ch1; ch1 = par*2
end do
end subroutine real_heap_down
subroutine real_heap_sort(a,n)
implicit none
real a(*),x
integer(8) n,i
do i = n/2, 1, -1
call real_heap_down(a,i,n)
end do
do i=n,2,-1
x = a(i); a(i) = a(1); a(1) = x
call real_heap_down(a,1_8,i-1)
end do
end subroutine real_heap_sort
end module module_sort
module module_deque
implicit none
private
type deque_node
type(deque_node) ,pointer:: prev => null(),next => null()
integer(8) val
end type deque_node
type,public:: deque
type(deque_node) ,pointer:: first => null(),last => null(), ptr => null()
integer(8):: size=0
contains
procedure:: push_back => deque_push_back
procedure:: push_front => deque_push_front
procedure:: pop_back => deque_pop_back
procedure:: pop_front => deque_pop_front
end type deque
contains
subroutine deque_push_back(self,val)
class(deque)::self
integer(8)::val
if(self%size == 0) then
allocate(self%first)
self%last => self%first
self%first%val = val
self%size = 1
else
allocate(self%last%next)
self%last%next%prev => self%last
self%last => self%last%next
self%last%val = val
self%size = self%size+1
end if
end subroutine deque_push_back
subroutine deque_push_front(self,val)
class(deque)::self
integer(8)::val
if(self%size == 0) then
allocate(self%first)
self%last => self%first
self%first%val = val
self%size = 1
else
allocate(self%first%prev)
self%first%prev%next => self%first
self%first => self%first%prev
self%first%val = val
self%size = self%size+1
end if
end subroutine deque_push_front
subroutine deque_pop_back(self)
class(deque)::self
if(self%size == 0) then
return
else if(self%size == 1) then
self%size = 0
deallocate(self%last)
self%last => null(); self%first => null()
else
self%last => self%last%prev
deallocate(self%last%next)
self%last%next => null()
self%size = self%size-1
end if
end subroutine deque_pop_back
subroutine deque_pop_front(self)
class(deque)::self
if(self%size == 0) then
return
else if(self%size == 1) then
self%size = 0
deallocate(self%first)
self%last => null(); self%first => null()
else
self%first => self%first%next
deallocate(self%first%prev)
self%first%prev => null()
self%size = self%size-1
end if
end subroutine deque_pop_front
end module module_deque
module module_RedBlackTree
implicit none
private
integer(8),parameter :: red = 1,black = 0
type RBT_Int_node
type(RBT_Int_node),pointer :: par=>null(), left => null(),right => null()
integer(8) :: key
integer(8) :: val=0
integer(8) :: color=red
end type RBT_Int_node
type RBT_Char_node
type(RBT_Char_node),pointer :: par=>null(), left => null(),right => null()
character(100) :: key
integer(8) :: val=0
integer(8) :: color=red
end type RBT_Char_node
type(RBT_Int_node) ,pointer,save :: rbt_int_nil
type(RBT_Char_node) ,pointer,save :: rbt_char_nil
type,public:: RedBlackTree_Int
type(RBT_Int_node),pointer :: root => null()
integer(8) :: size = 0
contains
procedure:: insert => Int_Insert
procedure:: get_val => Int_Get
procedure:: find => Int_Find
procedure:: add => Int_Add
procedure:: FixUp => Int_FixUp
end type RedBlackTree_Int
type,public:: RedBlackTree_Char
type(RBT_Char_node),pointer :: root => null()
integer(8) :: size = 0
contains
procedure:: insert => Char_Insert
procedure:: get_val => Char_Get
procedure:: find => Char_Find
procedure:: add => Char_Add
procedure:: FixUp => Char_FixUp
end type RedBlackTree_Char
contains
subroutine Int_Init()
implicit none
if(.not.associated(rbt_int_nil)) then
allocate(rbt_int_nil)
rbt_int_nil%color = black
end if
end subroutine Int_Init
recursive function Int_Get(self,key) result(val)
implicit none
class(RedBlackTree_Int), intent(in) :: self
integer(8) :: key
integer(8) :: val
type(RBT_Int_node),pointer :: u
if(.not.associated(rbt_int_nil)) then
allocate(rbt_int_nil)
rbt_int_nil%color = black
end if
if(self%size == 0) then
val = -1
return
end if
u => Int_SearchTree(self%root,key)
val = u%val
return
end function Int_Get
recursive function Int_Find(self,key) result(res)
implicit none
class(RedBlackTree_Int), intent(in) :: self
integer(8) :: key
logical :: res
type(RBT_Int_node),pointer :: u
if(.not.associated(rbt_int_nil)) then
allocate(rbt_int_nil)
rbt_int_nil%color = black
end if
if(self%size == 0) then
res = .false.
return
end if
u => Int_SearchTree(self%root,key)
res = (.not.associated(u,rbt_int_nil))
return
end function Int_Find
recursive subroutine Int_Add(self,key,val)
implicit none
class(RedBlackTree_Int), intent(inout) :: self
integer(8) :: key
type(RBT_Int_node),pointer :: u
integer(8) :: val
if(.not.associated(rbt_int_nil)) then
allocate(rbt_int_nil)
rbt_int_nil%color = black
end if
if(self%size == 0) then
call self%insert(key,val)
return
end if
u => Int_SearchTree(self%root,key)
if (associated(u,rbt_int_nil)) then
call self%insert(key,val)
else
u%val = u%val+val
end if
return
end subroutine Int_Add
recursive function Int_SearchTree(u,key) result(res)
implicit none
type(RBT_Int_node), pointer :: u,res
integer(8) :: key
if(associated(u,rbt_int_nil)) then
res => rbt_int_nil
return
end if
if(key < u%key) then
res => Int_SearchTree(u%left,key)
return
else if(key > u%key) then
res => Int_SearchTree(u%right,key)
return
else
res => u
return
end if
end function Int_SearchTree
subroutine Int_Insert(self,key,val)
implicit none
class(RedBlackTree_Int),intent(inout):: self
integer(8),intent(in) :: key
integer(8),intent(in) :: val
type(RBT_Int_node),pointer,save :: now, u
if(.not.associated(rbt_int_nil)) then
allocate(rbt_int_nil)
rbt_int_nil%color = black
end if
!allocate new RBT_Int_node
allocate(u)
u%key = key; u%val = val
u%left => rbt_int_nil; u%right => rbt_int_nil
!insert new RBT_Int_node
if(self%size == 0) then
u%left => rbt_int_nil; u%right => rbt_int_nil; u%par => rbt_int_nil
self%root => u
self%root%color = black
self%size = 1
return
else
now => self%root
if(.not.Insert_RBT_Int_node(u,now)) return
end if
!Fix Tree
call self%FixUp(u)
self%size = self%size+1
end subroutine Int_Insert
recursive function Insert_RBT_Int_node(u,now) result(added)
implicit none
type(RBT_Int_node), pointer:: u,now
logical :: added
if(u%key < now%key) then
if(associated(now%left,rbt_int_nil)) then
now%left => u
u%par => now
added = .true.
else
now => now%left
added = Insert_RBT_Int_node(u,now)
end if
return
else if(u%key > now%key) then
if(associated(now%right,rbt_int_nil)) then
now%right => u
u%par => now
added = .true.
else
now => now%right
added = Insert_RBT_Int_node(u,now)
end if
return
else
added = .false.
return
end if
end function Insert_RBT_Int_node
subroutine Int_FixUp(self,u)
implicit none
class(RedBlackTree_Int),intent(inout) :: self
type(RBT_Int_node),pointer,intent(inout) :: u
type(RBT_Int_node),pointer :: w,g
if(.not.associated(rbt_int_nil)) then
allocate(rbt_int_nil)
rbt_int_nil%color = black
end if
nullify(w,g)
do while(u%color == red)
if(u%key == self%root%key) then
u%color = black
return
end if
w => u%par
if(w%left%color == black) then
call Int_FripLeft(w,self%root)
u => w
w => u%par
end if
if(w%color == black) return
g => w%par
if(g%right%color == black) then
call Int_FripRight(g,self%root)
return
else
call Int_PushBlack(g)
u => g
end if
end do
end subroutine Int_FixUp
subroutine Int_PushBlack(u)
implicit none
type(RBT_Int_node), pointer:: u
u%color = red; u%left%color = black; u%right%color = black;
end subroutine Int_PushBlack
subroutine Int_PullBlack(u)
implicit none
type(RBT_Int_node), pointer:: u
u%color = black; u%left%color = red; u%right%color = red;
end subroutine Int_PullBlack
subroutine Int_FripLeft(u,root)
implicit none
type(RBT_Int_node), pointer, intent(inout) :: root
type(RBT_Int_node), pointer :: u,w
integer(8) :: tmp
tmp = u%color; u%color = u%right%color; u%right%color = tmp
w => u%right
w%par => u%par
if(.not.associated(u%par,rbt_int_nil)) then
if(associated(w%par%left,u)) then
w%par%left=>w
else
w%par%right=>w
end if
end if
u%right => w%left
if(.not.associated(u%right,rbt_int_nil))u%right%par => u
u%par => w
w%left => u
if(associated(u,root)) then
root => w
root%par => rbt_int_nil
end if
end subroutine Int_FripLeft
subroutine Int_FripRight(u,root)
implicit none
type(RBT_Int_node), pointer,intent(inout):: root
type(RBT_Int_node), pointer :: u,w
integer(8) :: tmp
tmp = u%color; u%color = u%left%color; u%left%color = tmp
w => u%left
w%par => u%par
if(.not.associated(u%par,rbt_int_nil)) then
if(associated(w%par%left,u)) then
w%par%left=>w
else
w%par%right=>w
end if
end if
u%left => w%right
if(.not.associated(u%left,rbt_int_nil))u%left%par => u
u%par => w
w%right => u
if(associated(u,root)) then
root => w
root%par => rbt_int_nil
end if
end subroutine Int_FripRight
subroutine Char_Init()
implicit none
if(.not.associated(rbt_char_nil)) then
allocate(rbt_char_nil)
rbt_char_nil%color = black
end if
end subroutine Char_Init
recursive function Char_Get(self,key) result(val)
implicit none
class(RedBlackTree_Char), intent(in) :: self
Character(*) :: key
integer(8) :: val
type(RBT_Char_node),pointer :: u
if(.not.associated(rbt_char_nil)) then
allocate(rbt_char_nil)
rbt_char_nil%color = black
end if
if(self%size == 0) then
val = -1
return
end if
u => Char_SearchTree(self%root,key)
val = u%val
return
end function Char_Get
recursive function Char_Find(self,key) result(res)
implicit none
class(RedBlackTree_Char), intent(in) :: self
Character(*) :: key
logical :: res
type(RBT_Char_node),pointer :: u
if(.not.associated(rbt_char_nil)) then
allocate(rbt_char_nil)
rbt_char_nil%color = black
end if
if(self%size == 0) then
res = .false.
return
end if
u => Char_SearchTree(self%root,key)
res = (.not.associated(u,rbt_char_nil))
return
end function Char_Find
recursive subroutine Char_Add(self,key,val)
implicit none
class(RedBlackTree_Char), intent(inout) :: self
Character(*) :: key
type(RBT_Char_node),pointer :: u
integer(8) :: val
if(.not.associated(rbt_char_nil)) then
allocate(rbt_char_nil)
rbt_char_nil%color = black
end if
if(self%size == 0) then
call self%insert(key,val)
return
end if
u => Char_SearchTree(self%root,key)
if (associated(u,rbt_char_nil)) then
call self%insert(key,val)
else
u%val = u%val+val
end if
return
end subroutine Char_Add
recursive function Char_SearchTree(u,key) result(res)
implicit none
type(RBT_Char_node), pointer :: u,res
Character(*) :: key
if(associated(u,rbt_char_nil)) then
res => rbt_char_nil
return
end if
if(key < u%key) then
res => Char_SearchTree(u%left,key)
return
else if(key > u%key) then
res => Char_SearchTree(u%right,key)
return
else
res => u
return
end if
end function Char_SearchTree
subroutine Char_Insert(self,key,val)
implicit none
class(RedBlackTree_Char),intent(inout) :: self
Character(*),intent(in) :: key
integer(8),intent(in) :: val
type(RBT_Char_node),pointer,save :: now, u
if(.not.associated(rbt_char_nil)) then
allocate(rbt_char_nil)
rbt_char_nil%color = black
end if
!allocate new RBT_Char_node
allocate(u)
u%key = key; u%val = val
u%left => rbt_char_nil; u%right => rbt_char_nil
!insert new RBT_Char_node
if(.not. associated(self%root)) then
u%left => rbt_char_nil; u%right => rbt_char_nil; u%par => rbt_char_nil
self%root => u
self%root%color = black
self%size = 1
return
else
now => self%root
if(.not.Insert_RBT_Char_node(u,now)) return
end if
!Fix Tree
call self%FixUp(u)
self%size = self%size+1
end subroutine Char_Insert
recursive function Insert_RBT_Char_node(u,now) result(added)
implicit none
type(RBT_Char_node), pointer:: u,now
logical :: added
if(u%key < now%key) then
if(associated(now%left,rbt_char_nil)) then
now%left => u
u%par => now
added = .true.
else
now => now%left
added = Insert_RBT_Char_node(u,now)
end if
return
else if(u%key > now%key) then
if(associated(now%right,rbt_char_nil)) then
now%right => u
u%par => now
added = .true.
else
now => now%right
added = Insert_RBT_Char_node(u,now)
end if
return
else
added = .false.
return
end if
end function Insert_RBT_Char_node
subroutine Char_FixUp(self,u)
implicit none
class(RedBlackTree_Char),intent(inout) :: self
type(RBT_Char_node),pointer,intent(inout) :: u
type(RBT_Char_node),pointer :: w,g
if(.not.associated(rbt_char_nil)) then
allocate(rbt_char_nil)
rbt_char_nil%color = black
end if
nullify(w,g)
do while(u%color == red)
if(u%key == self%root%key) then
u%color = black
return
end if
w => u%par
if(w%left%color == black) then
call Char_FripLeft(w,self%root)
u => w
w => u%par
end if
if(w%color == black) return
g => w%par
if(g%right%color == black) then
call Char_FripRight(g,self%root)
return
else
call Char_PushBlack(g)
u => g
end if
end do
end subroutine Char_FixUp
subroutine Char_PushBlack(u)
implicit none
type(RBT_Char_node), pointer:: u
u%color = red; u%left%color = black; u%right%color = black;
end subroutine Char_PushBlack
subroutine Char_PullBlack(u)
implicit none
type(RBT_Char_node), pointer:: u
u%color = black; u%left%color = red; u%right%color = red;
end subroutine Char_PullBlack
subroutine Char_FripLeft(u,root)
implicit none
type(RBT_Char_node), pointer, intent(inout) :: root
type(RBT_Char_node), pointer :: u,w
integer(8) :: tmp
tmp = u%color; u%color = u%right%color; u%right%color = tmp
w => u%right
w%par => u%par
if(.not.associated(u%par,rbt_char_nil)) then
if(associated(w%par%left,u)) then
w%par%left=>w
else
w%par%right=>w
end if
end if
u%right => w%left
if(.not.associated(u%right,rbt_char_nil))u%right%par => u
u%par => w
w%left => u
if(associated(u,root)) then
root => w
root%par => rbt_char_nil
end if
end subroutine Char_FripLeft
subroutine Char_FripRight(u,root)
implicit none
type(RBT_Char_node), pointer,intent(inout):: root
type(RBT_Char_node), pointer :: u,w
integer(8) :: tmp
tmp = u%color; u%color = u%left%color; u%left%color = tmp
w => u%left
w%par => u%par
if(.not.associated(u%par,rbt_char_nil)) then
if(associated(w%par%left,u)) then
w%par%left=>w
else
w%par%right=>w
end if
end if
u%left => w%right
if(.not.associated(u%left,rbt_char_nil))u%left%par => u
u%par => w
w%right => u
if(associated(u,root)) then
root => w
root%par => rbt_char_nil
end if
end subroutine Char_FripRight
end module module_RedBlackTree
module module_MinHeap
implicit none
private
type MH_node
type(MH_node),pointer :: par=>null(), left => null(),right => null()
integer(8) :: key,val
integer(8) :: size
end type MH_node
type(MH_node) ,pointer,save :: heap_nil
type,public:: MinHeap
type(MH_node),pointer :: root,last
integer(8) :: size = 0
contains
procedure:: push => MinHeap_Insert_MH_node
procedure:: pop => MinHeap_Pop_MH_node
end type MinHeap
contains
subroutine MinHeap_Up(root,u)
implicit none
type(MH_node),pointer :: root,u
integer(8) :: tmp
do while(.not.associated(root,u))
if(u%key < u%par%key) then
tmp = u%key
u%key = u%par%key
u%par%key = tmp
tmp = u%val
u%val = u%par%val
u%par%val = tmp
u => u%par
else
return
end if
end do
return
end subroutine MinHeap_Up
subroutine MinHeap_Down(root)
implicit none
type(MH_node),pointer:: root,u
integer(8) :: tmp
u => root
do while(.not.associated(u%left,heap_nil))
if(.not.associated(u%right,heap_nil)) then
if (u%right%key < u%left%key .and. u%right%key < u%key) then
tmp = u%key
u%key = u%right%key
u%right%key = tmp
tmp = u%val
u%val = u%right%val
u%right%val = tmp
u => u%right
cycle
end if
end if
if(u%left%key < u%key) then
tmp = u%key
u%key = u%left%key
u%left%key = tmp
tmp = u%val
u%val = u%left%val
u%left%val = tmp
u => u%left
cycle
end if
exit
end do
return
end subroutine MinHeap_Down
subroutine Update_Size(root,u,is_add)
implicit none
type(MH_node),pointer :: root,u
logical :: is_add
do while(.not.associated(root,u))
if(is_add) then
u%size = u%size+1
else
u%size = u%size-1
end if
u => u%par
end do
if(is_add) then
u%size = u%size+1
else
u%size = u%size-1
end if
end subroutine Update_size
subroutine MinHeap_Insert_MH_node(self,key,val)
implicit none
class(MinHeap) :: self
type(MH_node),pointer :: u,now
integer(8) :: key,val
if(.not.associated(heap_nil)) allocate(heap_nil)
u => null()
allocate(u)
u%key = key
u%val = val
u%left => heap_nil; u%right => heap_nil
u%size = 1
if(self%size == 0) then
self%root => u
self%root%par => heap_nil
self%size = 1
return
end if
now => self%root
do
now%size = now%size+1
if(.not.associated(now%left,heap_nil)) then
if(.not.associated(now%right,heap_nil)) then
if(now%right%size < now%left%size) then
now => now%right; cycle
else
now => now%left; cycle
end if
else
now%right => u
u%par => now
exit
end if
else
now%left => u
u%par => now
exit
end if
end do
call MinHeap_Up(self%root,u)
self%size = self%size+1
end subroutine MinHeap_Insert_MH_node
subroutine MinHeap_Pop_MH_node(self)
implicit none
class(MinHeap) :: self
type(MH_node),pointer :: u,now
integer(8) :: tmp
if(.not.associated(heap_nil)) allocate(heap_nil)
if(self%size == 0) return
now => self%root
do
now%size = now%size-1
if(.not.associated(now%left,heap_nil)) then
if(.not.associated(now%right,heap_nil)) then
if(now%right%size >= now%left%size) then
now => now%right; cycle
else
now => now%left; cycle
end if
else
u => now%left
tmp = u%key
u%key = self%root%key
self%root%key = tmp
tmp = u%val
u%val = self%root%val
self%root%val = tmp
now%left => heap_nil
exit
end if
else if(associated(now,self%root)) then
deallocate(self%root)
self%size = 0
return
else
u => now
tmp = u%key
u%key = self%root%key
self%root%key = tmp
tmp = u%val
u%val = self%root%val
self%root%val = tmp
if(associated(now%par%left,now)) then
now%par%left => heap_nil
else
now%par%right => heap_nil
end if
exit
end if
end do
deallocate(u)
self%size = self%size-1
call MinHeap_Down(self%root)
end subroutine MinHeap_Pop_MH_node
end module module_MinHeap
recursive function gcd(a,b) result(res)
implicit none
integer(8) :: a,b,res
if(a < b) then
res = gcd(b,a)
return
end if
if(mod(a,b) == 0) then
res = b
return
else
res = gcd(b,mod(a,b))
return
end if
end function gcd
recursive function mod_pow(a,b,modulo) result(res)
implicit none
integer(8) :: a,b,modulo,res
if(b == 0) then
res = 1
return
end if
if(mod(b,2) == 1) then
res = mod(a*mod_pow(a,b-1,modulo),modulo)
else
res = mod(mod_pow(a,b/2,modulo)**2,modulo)
end if
return
end function mod_pow
subroutine compress(lis,size)
use module_sort
use module_RedBlackTree
implicit none
integer(8) :: size,res
integer(8) :: lis(*),tmp_lis(size)
integer(8) :: i
type(RedBlackTree_Int) :: map
do i = 1, size
call map%insert(lis(i),0_8)
end do
tmp_lis(1:size) = lis(1:size)
call sort(tmp_lis,size)
res = 0
call map%add(tmp_lis(1),res)
do i = 2, size
if(tmp_lis(i) /= tmp_lis(i-1)) then
res = res+1
call map%add(tmp_lis(i),res)
end if
end do
do i = 1, size
lis(i) = map%get_val(lis(i))
enddo
end subroutine compress
module global
use module_sort
use module_deque
use module_RedBlackTree
use module_MinHeap
implicit none
end module global
program main
use global
implicit none
integer(8) :: D1,D2,ans = 0
integer(8) :: x,y
read *, D1, D2
if(D1 > D2) then
ans = 0
else if(D1 == D2) then
ans = 4
else if (D1*2 > D2) then
ans = 8
else if(D1*2 == D2) then
ans = 4
else
ans = 0
end if
print '(i0)', ans
end program main