結果
| 問題 | No.3 ビットすごろく |
| コンテスト | |
| ユーザー |
jj
|
| 提出日時 | 2016-07-23 07:35:52 |
| 言語 | Fortran (gFortran 14.2.0) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 2,867 bytes |
| コンパイル時間 | 205 ms |
| コンパイル使用メモリ | 33,792 KB |
| 実行使用メモリ | 6,820 KB |
| 最終ジャッジ日時 | 2024-11-06 14:43:54 |
| 合計ジャッジ時間 | 1,189 ms |
|
ジャッジサーバーID (参考情報) |
judge5 / judge1 |
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| ファイルパターン | 結果 |
|---|---|
| other | AC * 28 WA * 5 |
ソースコード
integer function get_reach_num(n)
implicit none
integer::i, n, reach_num
get_reach_num = 0
if (n.eq.1) then
get_reach_num = 1
return
end if
do i=max(1,n-(31-LEADZ(10000))), n
if (n.eq.POPCNT(i)+i) then
get_reach_num = get_reach_num + 1
end if
end do
end function get_reach_num
module stack
integer::top
integer,allocatable::contents(:)
contains
subroutine construct(N)
integer::N
allocate(contents(N))
top = 0
end subroutine construct
end module stack
logical function is_empty()
use stack
is_empty = top.eq.0
end function is_empty
integer function pop()
use stack
pop = contents(top)
top = top - 1
end function pop
integer function get_size()
use stack
get_size = top
end function get_size
subroutine push(n)
use stack
integer::n
top = top + 1
contents(top) = n
end subroutine push
integer function get_least_step(need_step, temp, N, reach_num)
use stack
implicit none
interface
integer function pop()
end function pop
integer function get_size()
end function get_size
logical function is_empty()
end function is_empty
end interface
integer,allocatable::need_step(:),temp(:)
integer::num,popcount,size,step,reach_num,i,j,N, pos
call construct(N)
call push(1)
need_step(1)=1
do i=1,N
size = get_size()
do j=1, size
temp(j) = pop()
end do
do j=1, size
pos = temp(j)
popcount = POPCNT(pos)
step = need_step(pos)
if(pos+popcount.eq.N) then
get_least_step = step+1
return
end if
if(pos+popcount.le.N) then
if (need_step(pos+popcount) .gt. step+1) then
need_step(pos+popcount) = step + 1
call push(pos+popcount)
end if
end if
if(pos-popcount.gt.1) then
if (need_step(pos-popcount) .gt. step+1) then
need_step(pos-popcount) = step + 1
call push(pos-popcount)
end if
end if
end do
if(is_empty().eqv..true.) then
exit
end if
end do
get_least_step = need_step(N)
end function get_least_step
program main
implicit none
interface
integer function get_reach_num(n)
integer::n
end function get_reach_num
integer function get_least_step(need_step, temp,N, reach_num)
integer,allocatable::need_step(:),temp(:)
integer::N,reach_num
end function get_least_step
end interface
integer::N, least_step, reach_num
integer,allocatable::need_step(:),temp(:)
read *,N
reach_num = get_reach_num(N)
if(reach_num.eq.0) then
print '(a)',"-1"
return
endif
allocate(need_step(N))
allocate(temp(N))
need_step=N
temp=0
least_step = get_least_step(need_step,temp,N, reach_num)
print '(i0)',least_step
end program main
jj