23.js

const input = `#.###########################################################################################################################################
#.#.................#...#...#...###.....#####...#.....###...#...###...#.......#.....#...#...###...###...#...###...###...#...#.....#...#.....#
#.#.###############.#.#.#.#.#.#.###.###.#####.#.#.###.###.#.#.#.###.#.#.#####.#.###.#.#.#.#.###.#.###.#.#.#.###.#.###.#.#.#.#.###.#.#.#.###.#
#.#...#.............#.#...#.#.#...#.#...#.....#.#...#...#.#...#.#...#.#.....#...#...#.#.#.#.#...#.###.#.#.#.#...#.....#.#.#.#...#...#.#...#.#
#.###.#.#############.#####.#.###.#.#.###.#####.###.###.#.#####.#.###.#####.#####.###.#.#.#.#.###.###.#.#.#.#.#########.#.#.###.#####.###.#.#
#.#...#.....#...#...#...#...#.#...#.#...#.....#.#...#...#...#...#...#.#...#...#...###.#.#.#.#...#.#...#.#.#.#.#.........#.#.#...#.....#...#.#
#.#.#######.#.#.#.#.###.#.###.#.###.###.#####.#.#.###.#####.#.#####.#.#.#.###.#.#####.#.#.#.###.#.#.###.#.#.#.#.#########.#.#.###.#####.###.#
#.#.#.......#.#.#.#.#...#...#.#...#.#...#.....#.#...#.#...#.#...>.>.#...#.#...#.>.>.#.#.#.#.###.#.#.#...#.#.#.#.###.....#.#.#.#...#...#.#...#
#.#.#.#######.#.#.#.#.#####.#.###.#.#.###.#####.###.#.#.#.#.#####v#######.#.#####v#.#.#.#.#.###.#.#.#.###.#.#.#.###.###.#.#.#.#.###.#.#.#.###
#.#.#...#...#.#.#.#.#...#...#.#...#.#.###.....#...#.#.#.#.#.....#.......#.#...###.#.#.#.#.#...#.#...#...#.#.#.#.>.>.#...#.#.#.#.#...#.#.#...#
#.#.###v#.#.#.#.#.#.###.#.###.#.###.#.#######.###.#.#.#.#.#####.#######.#.###.###.#.#.#.#.###.#.#######.#.#.#.###v###.###.#.#.#.#.###.#.###.#
#...###.>.#.#.#.#.#.#...#...#.#.#...#...###...#...#.#.#.#.......#...#...#.....#...#...#.#...#.#.#.......#.#...#...#...#...#.#.#...#...#.#...#
#######v###.#.#.#.#.#.#####.#.#.#.#####.###.###.###.#.#.#########.#.#.#########.#######.###.#.#.#.#######.#####.###.###.###.#.#####.###.#.###
#.....#...#.#.#.#.#.#.....#.#.#.#...#...#...###...#.#...#...#.....#...###...#...###.....#...#...#.....#...#.....###...#...#.#.#.....#...#...#
#.###.###.#.#.#.#.#.#####.#.#.#.###.#.###.#######.#.#####.#.#.###########.#.#.#####.#####.###########.#.###.#########.###.#.#.#.#####.#####.#
#...#.....#...#.#.#...#...#.#.#.#...#.>.>.#...#...#.#...#.#.#.........###.#.#.....#.....#.........###.#.###.......#...#...#.#.#.....#.#.....#
###.###########.#.###.#.###.#.#.#.#####v###.#.#.###.#.#.#.#.#########.###.#.#####.#####.#########.###.#.#########.#.###.###.#.#####.#.#.#####
###.....#...###...###.#.#...#.#...#...#.....#.#.....#.#...#.....#...#.....#.#.....###...#...#.....#...#...###...#.#...#.#...#.#.....#.#.....#
#######.#.#.#########.#.#.###.#####.#.#######.#######.#########.#.#.#######.#.#######.###.#.#.#####.#####.###.#.#.###.#.#.###.#.#####.#####.#
#.......#.#.........#.#.#...#...#...#...#.....###.....#.......#...#...#.....#.......#.#...#.#.....#.#.....#...#.#...#.#.#...#.#.#...#.#.....#
#.#######.#########.#.#.###.###.#.#####.#.#######.#####.#####.#######.#.###########.#.#.###.#####.#.#.#####.###.###.#.#.###.#.#.#.#.#.#.#####
#.#.....#.#.........#.#.###.#...#.....#...###.....#.....#####.......#.#.#...........#...###.#.....#...###...###...#.#.#...#...#...#...#.....#
#.#.###.#.#.#########.#.###.#.#######.#######.#####.###############.#.#.#.#################.#.###########.#######.#.#.###.#################.#
#.#.#...#.#.........#.#.#...#.#.....#.......#.......#...............#...#.................#.#.#.....#.....#...###...#.....###...............#
#.#.#.###.#########.#.#.#.###.#.###.#######.#########.###################################.#.#.#.###.#.#####.#.###############.###############
#...#...#.#.......#.#...#.....#...#.........#.....#...#.................#.......#...#.....#...#...#.#...###.#...#...#...###...#.........#...#
#######.#.#.#####.#.#############.###########.###.#.###.###############.#.#####.#.#.#.###########.#.###.###.###.#.#.#.#.###.###.#######.#.#.#
#...###...#.....#...###...###...#.........#...#...#.....#####...#...#...#.#...#...#.#...#.........#...#.....#...#.#...#...#.....###...#...#.#
#.#.###########v#######.#.###.#.#########.#.###.#############.#.#.#.#.###.#.#.#####.###.#.###########.#######.###.#######.#########.#.#####.#
#.#...........#.>.###...#.#...#...........#...#...#...#...#...#...#...###...#.....#.....#.......#...#.......#.###.#.......#...#.....#.....#.#
#.###########.#v#.###.###.#.#################.###.#.#.#.#.#.#####################.#############.#.#.#######.#.###.#.#######.#.#.#########.#.#
#...........#...#.#...#...#...........###...#.#...#.#.#.#.#...#...#...###...#...#.#...#.....###...#.#...###...#...#...#...#.#.#.........#...#
###########.#####.#.###.#############.###.#.#.#.###.#.#.#.###.#.#.#.#.###.#.#.#.#.#.#.#.###.#######.#.#.#######.#####.#.#.#.#.#########.#####
#.........#.....#.#...#.#...###.......#...#...#.#...#.#.#.#...#.#.#.#...#.#...#...#.#.#...#.....###...#...#...#...#...#.#.#.#.#...#.....#...#
#.#######.#####.#.###.#.#.#.###.#######.#######.#.###.#.#.#.###.#.#.###.#.#########.#.###.#####.#########.#.#.###.#.###.#.#.#.#.#.#v#####.#.#
#.......#.#.....#.#...#.#.#...#...#...#.......#.#.#...#.#.#...#.#.#...#.#.....###...#...#.....#.#...#.....#.#...#.#...#.#.#.#...#.>.#...#.#.#
#######.#.#.#####.#.###.#.###.###v#.#.#######.#.#.#.###.#.###v#.#.###.#.#####v###.#####.#####.#.#.#.#.#####.###.#.###.#.#.#.#######v#.#.#.#.#
#.......#.#.....#.#.###...#...#.>.>.#...#...#.#.#.#.#...#...>.>.#...#.#...#.>.>.#...#...#...#.#.#.#.#...###...#...###.#.#.#.......#.#.#...#.#
#.#######.#####.#.#.#######.###.#v#####.#.#.#.#.#.#.#.#######v#####.#.###.#.#v#.###.#.###.#.#.#.#.#.###v#####.#######.#.#.#######.#.#.#####.#
#.......#.#.....#.#.......#.....#...#...#.#.#.#.#.#...#####...#####.#.###...#.#.#...#...#.#.#.#...#...>.>...#.......#...#.#...#...#.#.#.....#
#######.#.#.#####.#######.#########.#.###.#.#.#.#.#########.#######.#.#######.#.#.#####.#.#.#.#########v###.#######.#####.#.#.#.###.#.#.#####
#.......#...#...#.....#...###...#...#.#...#.#.#.#.....#.....#.....#.#.#.......#.#.....#...#.#.###...#...#...#.......#.....#.#.#.#...#.#.....#
#.###########.#.#####.#.#####.#.#.###.#.###.#.#.#####.#.#####.###.#.#.#.#######.#####.#####.#.###.#.#.###.###.#######.#####.#.#.#.###.#####.#
#.............#.....#...###...#...###...###...#.#.....#.......#...#...#.......#.#.....#.....#.#...#...###...#.......#.....#.#...#.....#.....#
###################.#######.###################.#.#############.#############.#.#.#####.#####.#.###########.#######.#####.#.###########.#####
#.........#.....#...###...#.....#.....#...#...#.#.#.......#...#.....#...#...#.#...#...#...#...#.....###...#.#.....#.....#...###...#...#.....#
#.#######.#.###.#.#####.#.#####.#.###.#.#.#.#.#.#.#.#####.#.#.#####.#.#.#.#.#.#####.#.###.#.#######.###.#.#.#.###.#####.#######.#.#.#.#####.#
#...#...#...###...#...#.#.#.....#.#...#.#...#.#...#.....#...#.......#.#.#.#.#.#...#.#.###.#.#...###.....#.#...###...#...#.......#...#.......#
###.#.#.###########.#.#.#.#.#####.#.###.#####.#########.#############.#.#.#.#.#.#.#.#.###.#.#.#.#########.#########.#.###.###################
#...#.#.#...#...###.#.#.#.#.......#...#.#.....#.....###.......#.....#.#...#.#...#...#...#.#.#.#.........#.........#.#.###...#...#...........#
#.###.#.#.#.#.#.###.#.#.#.###########.#.#.#####.###.#########.#.###.#.#####.###########.#.#.#.#########.#########.#.#.#####.#.#.#.#########.#
#.....#...#...#...#.#...#.#...#.......#.#...#...#...#...#.....#...#.#.....#.............#...#.#.....###...........#.#.#...#...#...#.........#
#################.#.#####.#.#.#.#######.###.#.###.###.#.#.#######.#.#####.###################.#.###.###############.#.#.#.#########.#########
#.......#.........#.#.....#.#.#.#...#...#...#...#...#.#.#...#...#.#.#...#.......#.....###...#...###.........#.....#...#.#.###.....#.#.....###
#.#####.#.#########.#.#####.#.#v#.#.#.###.#####.###.#.#.###.#.#.#.#.#.#.#######.#.###.###.#.###############.#.###.#####.#.###.###.#.#.###.###
#.....#.#.......#...#.#...#.#.>.>.#...#...#...#.#...#.#.###.#.#.#.#...#.#.......#.#...#...#.###.............#...#...#...#.#...#...#...###...#
#####.#.#######.#.###.#.#.#.###v#######.###.#.#.#.###.#.###v#.#.#.#####.#.#######.#.###.###.###.###############.###.#.###.#.###.###########.#
#...#.#.........#...#.#.#.#.###.......#...#.#.#.#...#.#.#.>.>.#.#.....#.#.......#.#...#...#...#.............#...#...#...#.#...#.#...#.......#
#.#.#.#############.#.#.#.#.#########.###.#.#.#.###.#.#.#.#v###.#####.#.#######.#.###.###.###.#############.#.###.#####.#.###.#.#.#.#.#######
#.#...#.....#...#...#...#...#.........###.#.#.#.###...#.#.#.###.#...#.#.#.......#.#...###.#...#...#.........#...#.#...#.#.###.#.#.#.#.....###
#.#####.###.#.#.#.###########.###########.#.#.#.#######.#.#.###.#.#.#.#.#.#######.#.#####.#.###.#.#v###########.#.#.#.#.#.###.#.#.#.#####.###
#.......###.#.#.#...........#...#.......#.#.#.#.......#.#.#...#.#.#.#.#.#.....###.#...#...#.#...#.>.>.#...#...#.#.#.#.#.#...#.#.#.#.#...#...#
###########v#.#.###########.###.#.#####.#.#.#.#######.#.#.###.#.#.#.#.#.#####v###.###.#.###.#.#####v#.#.#.#.#.#.#.#.#.#.###.#.#.#.#.#.#.###.#
#.........#.>.#.#...#.....#.#...#.#.....#...#...#...#.#.#.#...#...#...#...#.>.>...#...#...#...#.....#.#.#.#.#.#.#.#.#.#...#.#.#.#.#.#.#.#...#
#.#######.#v###.#.#.#.###.#.#.###.#.###########.#.#.#.#.#.#.#############.#.#v#####.#####.#####.#####.#.#.#.#.#.#.#.#.###.#.#.#.#.#.#.#.#v###
#.....#...#.#...#.#...###.#.#...#.#.......#####.#.#.#.#...#.....###...###.#.#...#...#...#.....#.#...#...#.#.#...#.#.#...#.#.#.#.#.#.#.#.>.###
#####.#.###.#.###.#######.#.###.#.#######.#####.#.#.#.#########.###.#.###.#.###.#.###.#.#####.#.#.#.#####.#.#####.#.###.#.#.#.#.#.#.#.###v###
#.....#.....#...#.......#...###...#.....#.....#...#.#.#.........#...#...#.#.#...#.....#.#.....#...#.#.....#.....#.#...#...#.#.#...#.#.#...###
#.#############.#######.###########.###.#####.#####.#.#.#########.#####.#.#.#.#########.#.#########.#.#########.#.###.#####.#.#####.#.#.#####
#.............#.#.....#.....###...#...#.......#...#...#...........#.....#...#...#.....#...#.........#...#...#...#.#...#.....#.....#...#.....#
#############.#.#.###.#####.###.#.###.#########.#.#################.###########.#.###.#####.###########.#.#.#.###.#.###.#########.#########.#
#.............#...###.....#.#...#.###.#.........#.....#.......#...#.....###.....#.#...#...#...........#...#.#.###.#...#.#...#.....###...#...#
#.#######################.#.#.###.###.#.#############.#.#####.#.#.#####.###.#####.#.###.#.###########.#####.#.###.###.#.#.#.#.#######.#.#.###
#.#...#...###.........###...#...#.....#.#.............#.....#...#.......#...#...#.#...#.#.....#.......#...#.#...#.#...#...#...###...#.#...###
#.#.#.#.#.###.#######.#########.#######.#.#################.#############.###.#.#.###.#.#####.#.#######.#.#.###.#.#.#############.#.#.#######
#...#...#.....#.....#...#.....#...#.....#.#.....#...#.....#.#...#...#...#...#.#.#.#...#.#.....#.#...###.#.#.#...#...#...#...#...#.#.#...#####
###############.###.###.#.###.###.#.#####.#.###.#.#.#.###.#.#.#.#.#.#.#.###.#.#.#.#.###.#.#####.#.#.###.#.#.#.#######.#.#.#.#.#.#.#.###.#####
###.........#...###.....#...#.....#.#.....#.#...#.#...#...#...#...#...#.#...#.#...#...#.#.....#...#...#.#.#...#...#...#.#.#.#.#.#.#.###.....#
###.#######.#.#############.#######.#.#####.#.###.#####.###############.#.###.#######.#.#####.#######.#.#.#####.#.#.###.#.#.#.#.#.#.#######.#
#...#.....#...###...###...#.........#.....#.#...#...#...#...#...###.....#.....#...###...#.....#...#...#.#.#...#.#.#...#.#.#.#.#.#.#.#...#...#
#.###.###.#######.#.###.#.###############.#.###.###.#.###.#.#.#.###v###########.#.#######.#####.#.#v###.#.#.#.#.#.###.#.#.#.#.#.#.#.#v#.#.###
#.....###.......#.#...#.#.#...#.....#.....#...#...#.#...#.#...#...>.>.#####...#.#.###...#.#...#.#.>.>...#...#.#.#.#...#.#.#.#.#.#.#.>.#...###
###############.#.###.#.#.#.#.#.###.#.#######.###.#.###.#.#########v#.#####.#.#.#.###.#.#v#.#.#.###v#########.#.#.#.###.#.#.#.#.#.###v#######
#.......#.......#.#...#.#...#...#...#.....###...#.#.#...#...#.......#...#...#.#.#.#...#.>.>.#.#.###...#.....#.#.#.#...#.#.#.#.#.#.###.......#
#.#####.#v#######.#.###.#########.#######.#####.#.#.#.#####.#.#########.#.###.#.#.#.#####v###.#.#####.#.###.#.#.#.###.#.#.#.#.#.#.#########.#
#.....#.#.>.#...#.#...#.........#...#...#.#.....#...#.......#.......###...###.#.#...#.....###...#...#.#.#...#...#.#...#...#.#.#...###...#...#
#####.#.#v#.#.#.#.###.#########.###.#.#.#.#.#######################.#########.#.#####.###########.#.#.#.#.#######.#.#######.#.#######.#.#.###
###...#...#.#.#.#...#.#...#...#.#...#.#.#.#.........###...#.......#.#...#...#...###...#...###.....#.#...#...#...#.#.......#...#...#...#...###
###.#######.#.#.###.#.#.#.#.#.#.#.###.#.#v#########.###.#.#.#####.#.#.#.#.#.#######.###.#.###.#####.#######.#.#.#.#######.#####.#.#.#########
#...#.....#...#...#.#.#.#.#.#.#.#...#.#.>.>.#...#...#...#.#.....#.#...#...#...#...#.....#.....#.....#...###...#.#.#.......#.....#...###.....#
#.###.###.#######.#.#.#.#.#.#.#.###.#.###v#.#.#.#.###.###.#####.#.###########.#.#.#############.#####.#.#######.#.#.#######.###########.###.#
#...#...#...#...#...#.#.#.#.#.#.#...#.#...#...#...###...#.#...#.#.#...#...#...#.#...#...#.......###...#.........#...#...###...#...#...#.#...#
###.###.###.#.#.#####.#.#.#.#.#.#.###.#.###############.#.#.#.#.#.#.#.#.#.#.###.###.#.#.#.#########.#################.#.#####.#.#.#.#.#.#.###
#...#...###...#.....#.#.#.#.#...#.#...#.......#.........#...#.#.#...#...#.#...#...#...#...#...#.....#.................#...#...#.#.#.#.#.#.###
#.###.#############.#.#.#.#.#####.#.#########.#.#############.#.#########.###.###.#########.#.#.#####.###################.#.###.#.#.#.#.#.###
#.#...#...........#.#...#...###...#...#.......#...#.....#.....#.....#.....#...#...#...#.....#.#.......#...###.............#...#.#...#...#...#
#.#.###.#########.#.###########.#####.#.#########.#.###.#.#########.#.#####.###.###.#.#.#####.#########.#.###.###############.#.###########.#
#.#.###.........#.#.#.....#...#.......#.......###...#...#.....#...#.#.#...#...#.....#...#.....#.........#.#...#.....#...#...#...#...#...#...#
#.#.###########.#.#.#.###.#.#.###############.#######.#######.#.#.#.#.#.#.###.###########.#####.#########.#.###.###.#.#.#.#.#####.#.#.#.#.###
#...#...........#...#.#...#.#.#...#...........#.....#.......#.#.#...#...#.#...###...#.....#...#.........#.#.....#...#.#.#.#.#.....#.#.#.#.###
#####.###############.#.###.#.#.#.#.###########.###.#######.#.#.#########.#.#####.#.#.#####.#.#########.#.#######.###.#.#.#.#.#####.#.#.#.###
#.....#.........#...#.#...#.#.#.#.#...........#...#.###.....#.#...#...###...#...#.#.#.......#.....#.....#...#.....###.#.#.#.#.....#...#...###
#.#####.#######.#.#.#.###.#.#.#.#.###########.###.#.###.#####.###.#.#.#######.#.#.#.#############.#.#######.#.#######.#.#.#.#####v###########
#.#.....#.......#.#.#.#...#.#.#.#.###.........#...#.....#...#.....#.#.#.....#.#.#.#...#.....#.....#.......#.#...###...#.#.#...#.>.###...#...#
#.#.#####.#######.#.#.#.###.#.#.#.###v#########.#########.#.#######.#.#.###.#.#.#.###.#.###.#.###########.#.###.###.###.#.###.#.#v###.#.#.#.#
#...#...#.#...###.#.#.#.#...#.#.#...>.>.......#.........#.#.###...#.#.#.#...#.#.#.#...#...#...#...###...#.#.#...#...###...#...#.#.#...#...#.#
#####.#.#.#.#v###.#.#.#.#.###.#.#####v#######.#########.#.#.###.#.#.#.#.#.###.#.#.#.#####v#####.#.###.#.#.#.#v###.#########.###.#.#.#######.#
###...#...#.#.>.#.#.#.#.#.###.#.#.....#.......#...#...#.#.#.....#...#.#.#.#...#.#.#.#...>.>.#...#.#...#.#.#.>.>.#...#.......#...#...#.......#
###.#######.#v#.#.#.#.#.#.###.#.#.#####.#######.#.#.#.#v#.###########.#.#.#.###.#.#.#.###v#.#.###.#.###.#.###v#.###.#.#######.#######.#######
#...#...#...#.#.#.#.#.#.#...#...#.....#...#...#.#.#.#.>.>.#...###.....#.#.#...#.#.#.#.#...#...###.#.#...#.#...#.#...#.....#...#.....#.......#
#.###.#.#.###.#.#.#.#.#.###.#########.###.#.#.#.#.#.###v###.#.###.#####.#.###.#.#.#.#.#.#########.#.#.###.#.###.#.#######.#.###.###.#######.#
#.....#...#...#...#.#.#...#...#.......###.#.#.#.#.#.###.#...#...#.....#.#.#...#...#...#.........#.#.#...#.#...#.#.....###...###...#.........#
###########.#######.#.###.###.#.#########.#.#.#.#.#.###.#.#####.#####.#.#.#.###################.#.#.###.#.###.#.#####.###########.###########
#...#.......#####...#.###.#...#.........#...#.#.#.#...#.#.#.....#...#...#...#...#.......#.......#...###...#...#...#...#...........#...#.....#
#.#.#.###########.###.###.#.###########.#####.#.#.###.#.#.#.#####.#.#########.#.#.#####.#.#################.#####.#.###.###########.#.#.###.#
#.#.#...........#.#...###...#...........#...#.#.#.#...#.#.#.......#.......#...#...#...#...#...#...###.......#...#...#...#.........#.#.#.#...#
#.#.###########.#.#.#########.###########.#.#.#.#.#.###.#.###############.#.#######.#.#####.#.#.#.###.#######.#.#####.###.#######.#.#.#.#.###
#.#.............#...###.......#.........#.#.#...#.#.###...###...#...#...#.#.........#.......#...#...#...#...#.#.....#.....#.......#.#...#...#
#.#####################.#######.#######.#.#.#####.#.#########.#.#.#.#.#.#.#########################.###.#.#.#.#####.#######.#######.#######.#
#...#.............#...#...#.....#.......#.#.###...#...#.......#...#...#.#...###...###...#.......#...###...#...#...#.......#.......#.#.......#
###.#.###########.#.#.###.#.#####.#######.#.###.#####.#.###############.###.###.#.###.#.#.#####.#.#############.#.#######.#######.#.#.#######
###...#...........#.#...#...#...#.........#...#.......#...............#.....#...#...#.#...#...#...#####...#...#.#.........###.....#.#.#...###
#######.###########.###.#####.#.#############.#######################.#######.#####.#.#####.#.#########.#.#.#.#.#############.#####.#.#.#.###
#.......#...#...###...#.#.....#.......#.......#...#...................###...#...#...#.......#...#...#...#.#.#.#.........#.....#.....#...#...#
#.#######.#.#.#.#####.#.#.###########.#.#######.#.#.#####################.#.###.#.#############.#.#.#.###.#.#.#########.#.#####.###########.#
#...#.....#...#...#...#.#...........#...#.....#.#.#.................#.....#.....#.#.............#.#.#.#...#.#...#.....#.#.......#...........#
###.#.###########.#.###.###########.#####.###.#.#.#################.#.###########.#.#############.#.#.#.###v###.#.###.#.#########.###########
#...#.#...........#...#.###.....###...###...#.#.#...#...#...#.......#...........#.#.......#...#...#...#.#.>.>.#...#...#.#.....###...........#
#.###.#.#############.#.###.###.#####.#####.#.#.###.#.#.#.#.#.#################.#.#######.#.#.#.#######.#.###.#####.###.#.###.#############.#
#...#.#...........#...#...#...#.#.....#...#.#.#.#...#.#.#.#.#.###...#.....#.....#...#...#.#.#.#.......#.#.#...#...#.....#...#...#####.......#
###.#.###########.#.#####.###.#.#.#####.#.#.#.#.#.###.#.#.#.#v###.#.#.###.#.#######.#.#.#.#.#.#######.#.#.#.###.#.#########.###.#####.#######
#...#.#...........#...#...###.#.#...#...#.#.#...#.#...#.#.#.>.>.#.#.#.#...#.....#...#.#.#.#.#.#...#...#...#...#.#...###...#...#...#...#...###
#.###.#.#############.#.#####.#.###.#.###.#.#####.#.###.#.#####.#.#.#.#.#######.#.###.#.#v#.#.#.#.#.#########.#.###.###.#.###.###.#.###.#.###
#.#...#.......###...#.#.#...#.#.###.#...#.#.....#.#.#...#.....#.#.#.#.#.....#...#.#...#.>.>.#.#.#.#.......###...###...#.#.#...#...#...#.#...#
#.#.#########.###.#.#.#.#.#.#.#.###v###.#.#####.#.#.#.#######.#.#.#.#.#####.#.###.#.#########.#.#.#######.###########.#.#.#.###.#####.#.###.#
#...#...#.....#...#.#.#.#.#.#.#.#.>.>.#.#.#...#.#.#.#.....#...#...#.#.#.....#.#...#...###.....#.#...#...#.#...........#.#.#.#...#...#...#...#
#####.#.#.#####.###.#.#.#.#.#.#.#.###.#.#.#.#.#.#.#.#####.#.#######.#.#.#####.#.#####.###.#####.###.#.#.#.#.###########.#.#.#.###.#.#####v###
#.....#...#...#.#...#.#.#.#.#.#.#.#...#.#.#.#.#.#.#.#.....#.......#.#.#...#...#.#...#...#.....#...#.#.#.#.#.#...#.....#.#.#.#...#.#...#.>.###
#.#########.#.#.#.###.#.#.#.#.#.#.#.###.#.#.#.#.#.#.#.###########.#.#.###.#.###.#.#.###.#####.###.#.#.#.#.#.#.#.#.###.#.#.#.###.#.###.#.#v###
#...........#...#.....#...#...#...#.....#...#...#...#.............#...###...###...#.....#####.....#...#...#...#...###...#...###...###...#...#
###########################################################################################################################################.#`;
const example1 = `#.#####################
#.......#########...###
#######.#########.#.###
###.....#.>.>.###.#.###
###v#####.#v#.###.#.###
###.>...#.#.#.....#...#
###v###.#.#.#########.#
###...#.#.#.......#...#
#####.#.#.#######.#.###
#.....#.#.#.......#...#
#.#####.#.#.#########v#
#.#...#...#...###...>.#
#.#.#v#######v###.###v#
#...#.>.#...>.>.#.###.#
#####v#.#.###v#.#.###.#
#.....#...#...#.#.#...#
#.#########.###.#.#.###
#...###...#...#...#.###
###.###.#.###v#####v###
#...#...#.#.>.>.#.>.###
#.###.###.#.###.#.#v###
#.....###...###...#...#
#####################.#`;

const dirs = [
  [0, 1, '>'],
  [1, 0, 'v'],
  [0, -1, '<'],
  [-1, 0, '^']
];

(async function main () {
  for (let [name, rawData] of [['example1', example1], ['input', input]]) {
    const map = rawData.split('\n')
    const n = map.length
    const m = map[0].length
    const S = map[0].indexOf('.')
    const E = map[n - 1].indexOf('.')

    for (let part2 of [false, true]) {
      const vertexs = new Set()
      const dist = new Map()
      let ans = 0

      console.log('---------')
      console.log('|       |')
      console.log('| START |')
      console.log('|       |')
      console.log('---------')
      console.time(`start ${name} ${part2 ? 'part 2' : 'part 1'}`)

      vertexs.add(S)
      vertexs.add(n * (n - 1) + E)

      for (let i = 0; i < n; i++) {
        for (let j = 0; j < m; j++) {
          if (map[i][j] === '.') {
            let nbr = 0

            for (let [dy, dx] of dirs) {
              const ny = i + dy
              const nx = j + dx
              if (ny < 0 || ny >= n || nx < 0 || nx >= m) continue
              if (map[ny][nx] !== '#') nbr++
            }

            if (nbr > 2) vertexs.add(i * n + j)
          }
        }
      }

      for (let vertex of vertexs) {
        const q = [[vertex, 0]]
        const visited = new Set()

        dist.set(vertex, [])

        while (q.length) {
          const [v, l] = q.shift()

          if (visited.has(v)) continue
          visited.add(v)

          if (vertexs.has(v) && v != vertex) {
            dist.get(vertex).push([v, l])
            continue
          }

          for (let i = 0; i < dirs.length; i++) {
            const [dy, dx, ch] = dirs[i]
            const ny = (v / n >> 0) + dy
            const nx = v % n + dx

            if (ny < 0 || ny >= n || nx < 0 || nx >= n) continue
            if (map[ny][nx] === '#') continue
            if (
              !part2 &&
              map[ny][nx] != ch &&
              '>^<v'.includes(map[ny][nx])
            ) continue

            q.push([ny * n + nx, l + 1])
          }
        }
      }

      const seen = new Set()

      function dfs (v, d) {
        if (seen.has(v)) return

        seen.add(v)

        if (v / n >> 0 === n - 1) ans = Math.max(ans, d)

        for (let [vv, vd] of dist.get(v)) {
          dfs(vv, d + vd)
        }

        seen.delete(v)
      }

      dfs(S, 0)

      console.log(ans);
      console.timeEnd(`start ${name} ${part2 ? 'part 2' : 'part 1'}`)
    }
  }
})()