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+........991..272.....575.................................958...........917.....*............*.......94.....985...+587...184................. +...............................................657..........................423..........742.367...............................634.......... diff --git a/2023/data/day03ex1.txt b/2023/data/day03ex1.txt new file mode 100644 index 0000000..b20187f --- /dev/null +++ b/2023/data/day03ex1.txt @@ -0,0 +1,10 @@ +467..114.. +...*...... +..35..633. +......#... +617*...... +.....+.58. +..592..... +......755. +...$.*.... +.664.598.. diff --git a/2023/src/day03.f90 b/2023/src/day03.f90 new file mode 100644 index 0000000..1035a5d --- /dev/null +++ b/2023/src/day03.f90 @@ -0,0 +1,151 @@ +program day3 + implicit none + integer, parameter :: max_lines = 200 + integer, parameter :: max_chars = 200 + character(200) :: fname + integer :: n_arguments + character(10) :: numbers + character(11) :: non_symbols + character(1) :: symb + integer :: part_sum = 0 + integer :: part_val + character(max_chars) :: schematic(1:max_lines) + character(max_chars) :: temp_line + character(max_chars) :: num_string + integer :: line, cp0, cp1, cp2, i1, i2, cind + integer :: schematic_width, schematic_height + integer :: istat + logical :: is_part + integer, parameter :: max_gears = 10000 + integer :: gear_parts(max_gears, 0:2) + integer :: found_gears = 0 + integer, allocatable :: gearmap(:,:) + integer, allocatable :: gearval(:,:) + integer :: gear_ratio_sum = 0 + + n_arguments = command_argument_count() + if (n_arguments .eq. 1) then + call get_command_argument(1, fname) + print *, "File: ", fname + else + print *, "Wrong number of arguments: ", n_arguments + stop + end if + do i1=0,9 + numbers(i1+1:i1+1) = char(ichar('0') + i1) + end do + non_symbols(1:10) = numbers + non_symbols(11:11) = "." + open(10, file=fname) + do line=1,max_lines + read(10, "(A)", iostat = istat) temp_line + if (is_iostat_end(istat)) then + exit + else if (len_trim(temp_line) .eq. 0) then + exit + else + schematic(line) = temp_line + end if + end do + schematic_height = line - 1 + schematic_width = len_trim(schematic(1)) + do line=1,schematic_height + temp_line = schematic(line) + cp2 = 1 + do + cp0 = cp2 + cp1 = scan(temp_line(cp0:schematic_width), numbers) + if (cp1 .eq. 0) then + exit + end if + cp1 = cp1 + cp0 - 1 + cp2 = verify(temp_line(cp1:schematic_width), numbers) + if (cp2 .eq. 0) then + cp2 = schematic_width+1 + else + cp2 = cp2 + cp1 - 1 + end if + num_string = temp_line(cp1:(cp2-1)) + read(num_string, *) part_val + i1 = max(1, cp1-1) + i2 = min(schematic_width, cp2) + is_part = .false. + if (line .gt. 1) then + cind = verify(schematic(line-1)(i1:i2), non_symbols) + if (cind .ne. 0) then + symb = schematic(line-1)(i1 + cind - 1:i1 + cind - 1) + print *, line, cp1, symb, part_val + part_sum = part_sum + part_val + is_part = .true. + if (symb .eq. '*') then + found_gears = found_gears + 1 + gear_parts(found_gears, 0) = part_val + gear_parts(found_gears, 1) = cind+i1-1 + gear_parts(found_gears, 2) = line-1 + end if + end if + end if + cind = verify(schematic(line)(i1:i2), non_symbols) + if (cind .ne. 0) then + symb = schematic(line)(i1 + cind - 1:i1 + cind - 1) + print *, line, cp1, symb, part_val + if (.not. is_part) then + part_sum = part_sum + part_val + is_part = .true. + end if + if (symb .eq. '*') then + found_gears = found_gears + 1 + gear_parts(found_gears, 0) = part_val + gear_parts(found_gears, 1) = cind+i1-1 + gear_parts(found_gears, 2) = line + end if + end if + if (line .lt. schematic_height) then + cind = verify(schematic(line+1)(i1:i2), non_symbols) + if (cind .ne. 0) then + symb = schematic(line+1)(i1 + cind - 1:i1 + cind - 1) + print *, line, cp1, symb, part_val + part_sum = part_sum + part_val + if (.not. is_part) then + part_sum = part_sum + part_val + is_part = .true. + end if + if (symb .eq. '*') then + found_gears = found_gears + 1 + gear_parts(found_gears, 0) = part_val + gear_parts(found_gears, 1) = cind+i1-1 + gear_parts(found_gears, 2) = line+1 + end if + end if + end if + end do + end do + close(10) + print * + print *, "Sum of part numbers: ", part_sum + print *, "Number of found gears: ", found_gears + + allocate(gearmap(1:schematic_width, 1:schematic_height), source = 0) + allocate(gearval(1:schematic_width, 1:schematic_height), source = 1) + do i1=1,found_gears + cp1 = gear_parts(i1, 1) + cp2 = gear_parts(i1, 2) + gearmap(cp1, cp2) = gearmap(cp1, cp2) + 1 + gearval(cp1, cp2) = gearval(cp1, cp2) * gear_parts(i1, 0) + end do + do i1=1,found_gears + cp1 = gear_parts(i1, 1) + cp2 = gear_parts(i1, 2) + if (gearmap(cp1, cp2) .eq. 2) then + gearmap(cp1, cp2) = -1 + gear_ratio_sum = gear_ratio_sum + gearval(cp1, cp2) + end if + end do + print *, "Gear ratio sum: ", gear_ratio_sum + + + + deallocate(gearmap) + deallocate(gearval) + +end program day3