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3477b81b21
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97d6c075f3
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@ -1,8 +1,8 @@
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FC:=gfortran
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FFLAGS:=-Wall -Wno-maybe-uninitialized -O2
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FFLAGS:=-Wall -Wno-maybe-uninitialized
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BIN:=./bin
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SRC:=./src
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BINS:=./bin/day01.bin ./bin/day01b.bin ./bin/day02.bin ./bin/day03.bin ./bin/day04.bin ./bin/day05.bin ./bin/day05b.bin ./bin/day06.bin ./bin/day07.bin ./bin/day07b.bin ./bin/day08.bin ./bin/day08b.bin ./bin/day09.bin ./bin/day10.bin ./bin/day11.bin ./bin/day12.bin
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BINS:=./bin/day01.bin ./bin/day01b.bin ./bin/day02.bin ./bin/day03.bin ./bin/day04.bin ./bin/day05.bin ./bin/day05b.bin ./bin/day06.bin ./bin/day07.bin ./bin/day07b.bin ./bin/day08.bin ./bin/day08b.bin ./bin/day09.bin ./bin/day10.bin ./bin/day11.bin
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all: aoc19
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1001
2023/data/day12.txt
1001
2023/data/day12.txt
File diff suppressed because it is too large
Load Diff
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@ -1,7 +0,0 @@
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???.### 1,1,3
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.??..??...?##. 1,1,3
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?#?#?#?#?#?#?#? 1,3,1,6
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????.#...#... 4,1,1
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????.######..#####. 1,6,5
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?###???????? 3,2,1
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@ -1,225 +0,0 @@
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program day12
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implicit none
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integer, parameter :: max_chars = 300
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integer, parameter :: max_rows = 2000
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integer, parameter :: b_kind = selected_int_kind(15)
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character(200) :: fname
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character(max_chars) :: fline
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character(max_chars) :: springs, spt
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integer :: tn_spr, n_springs
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integer :: n_arguments
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integer :: n_repeats
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integer :: istat
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integer :: strlen
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integer, allocatable :: tspec(:), specifiers(:)
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integer :: tn_spec, n_specifiers
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integer :: i, i2, i3
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integer :: s_pos
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integer :: num_wc
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integer(kind=b_kind) :: val, total_valid
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n_arguments = command_argument_count()
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if (n_arguments .eq. 2) then
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call get_command_argument(1, fname)
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print *, "File: ", trim(fname)
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call get_command_argument(2, fline)
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read(fline, *) n_repeats
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print *, "Number of repeats: ", n_repeats
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else
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print *, "Wrong number of arguments: ", n_arguments
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stop
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end if
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open(10, file=fname)
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total_valid = 0
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do i=1,max_rows
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read(10, "(a)", iostat=istat) fline
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strlen = len_trim(fline)
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if ((strlen .eq. 0) .or. (is_iostat_end(istat))) then
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exit
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end if
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s_pos = scan(fline, " ")
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tn_spr = s_pos - 1
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spt = fline(1:tn_spr)
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tn_spec = 1
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do i2 = s_pos+1, strlen
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if (fline(i2:i2) .eq. ',') then
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tn_spec = tn_spec + 1
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end if
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end do
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n_specifiers = tn_spec * (1 + n_repeats)
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allocate(tspec(1:tn_spec))
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allocate(specifiers(1:n_specifiers))
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read(fline((s_pos + 1):strlen), *) tspec
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do i2=0,n_repeats
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do i3=1,tn_spec
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specifiers(i2 * tn_spec + i3) = tspec(i3)
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end do
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end do
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springs = spt
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if (n_repeats .ge. 1) then
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do i2=1,n_repeats
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springs = trim(springs) // '?' // trim(spt)
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end do
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end if
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n_springs = (n_repeats + 1) * tn_spr + n_repeats
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print *, "Row: ", i
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print *, "Original: ", trim(spt)
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print *, "Original specifiers: "
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print "(20i2)", tspec
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print *, "Expanded: ", trim(springs)
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print *, "Expanded specifiers: "
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print "(20i2)", specifiers
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num_wc = numstr(trim(springs), '?')
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print *, "Length: ", n_springs
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print *, "Number of wildcards: ", num_wc
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val = nvalid(springs, n_springs, specifiers, n_specifiers, .true.)
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print *, "Valid: ", val
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print *
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total_valid = total_valid + val
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deallocate(tspec)
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deallocate(specifiers)
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end do
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close(10)
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print *
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print *, "Total valid: ", total_valid
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contains
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function consistent(springs, n_spr, specs, n_specs)
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implicit none
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character(*), intent(in) ::springs
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integer, intent(in) :: specs(:)
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integer, intent(in) :: n_spr, n_specs
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logical :: consistent
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integer :: c1, c2, c3, i, speccur, clen
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consistent = .true.
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c1 = 1
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speccur = 0
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do i = 1, n_spr
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if (c1 .gt. n_spr) then
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consistent = speccur .eq. n_specs
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! We've run out of springs
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return
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end if
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c2 = scan(springs(c1:n_spr), '#')
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if (c2 .eq. 0) then
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consistent = speccur .eq. n_specs
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! Also run out of springs
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return
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end if
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c2 = c1 + c2 - 1
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c3 = verify(springs(c2:n_spr), '#')
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if (c3 .eq. 0) then
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! Ends at end of string
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c3 = n_spr
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else
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c3 = c2 + c3 - 2
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end if
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speccur = speccur + 1
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if (speccur .gt. n_specs) then
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consistent = .false.
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return
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end if
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clen = c3 - c2 + 1
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if (clen .ne. specs(speccur)) then
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consistent = .false.
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return
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end if
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c1 = c3 + 1
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end do
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print *, '???'
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end function consistent
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function numstr(springs, str)
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implicit none
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character(*), intent(in) :: springs, str
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integer :: numstr
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integer :: sprlen, i
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sprlen = len_trim(springs)
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numstr = 0
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do i=1,sprlen
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if (scan(springs(i:i), str) .ne. 0) then
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numstr = numstr + 1
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end if
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end do
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end function numstr
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function viable(springs, n_spr, specs, n_specs)
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implicit none
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character(*), intent(in) ::springs
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integer, intent(in) :: specs(:)
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integer, intent(in) :: n_spr, n_specs
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logical :: viable
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character(len=1) :: ch
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integer :: i, i2, spi, spc, nrq, remt
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logical :: ch1v, ch2v
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spi = 0
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spc = 0
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viable = .true.
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ch2v = .false.
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do i=1,n_spr
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ch1v = ch2v
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ch = springs(i:i)
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if (ch .eq. '?') then
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nrq = numstr(springs(i:n_spr), '?#')
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remt = 0
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do i2=spi,n_specs
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remt = remt + specs(i2)
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end do
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remt = remt - spc
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viable = (nrq .ge. remt)
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return
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end if
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ch2v = scan(ch, '#') .ne. 0
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if (ch2v) then
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if (ch1v) then
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spc = spc + 1
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if (spc .gt. specs(spi)) then
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viable = .false.
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return
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end if
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else
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spc = 1
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spi = spi + 1
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if (spi .gt. n_specs) then
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viable = .false.
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return
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end if
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end if
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end if
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end do
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end function viable
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recursive function nvalid(springs, n_spr, specs, n_specs, r_branch) result(nv)
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implicit none
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character(len=max_chars), intent(in) ::springs
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integer, intent(in) :: specs(:)
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integer, intent(in) :: n_spr, n_specs
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logical, intent(in) :: r_branch
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integer :: nv
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integer :: s_pos
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character(len=max_chars) :: test_spr
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nv = 0
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s_pos = scan(springs, '?')
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if (r_branch) then
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print *, "Right branch depth: ", s_pos
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end if
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if (s_pos .eq. 0) then
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if (consistent(springs, n_spr, specs, n_specs)) then
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nv = nv + 1
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end if
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return
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end if
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test_spr = springs
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test_spr(s_pos:s_pos) = '#'
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if (viable(test_spr, n_spr, specs, n_specs)) then
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nv = nv + nvalid(test_spr, n_spr, specs, n_specs, .false.)
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end if
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test_spr(s_pos:s_pos) = '.'
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if (viable(test_spr, n_spr, specs, n_specs)) then
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nv = nv + nvalid(test_spr, n_spr, specs, n_specs, r_branch)
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end if
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end function nvalid
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end program day12
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