import * as std from 'std';
//var data = std.loadFile('14.txt');
//data = data.trim().split('\n').map(k=>k.split(''));

function roll(line,x,dir)
{
  if (data[line][x] !== 'O') return;
  var nline = line-dir[0];
  var nx = x-dir[1];
  if (nline < 0 || nx < 0 || nline === data.length || nx === data[0].length) return;
  if (data[nline][nx] === '.') {
    data[nline][nx] = 'O';
    data[line][x] = '.';
    roll(nline,nx,dir);
  }
}

var cache = {};
cache.north = {};
cache.south = {};
cache.east = {};
cache.west = {};

function make_table() { return JSON.stringify(data); }
function print_table() { data.forEach(p=>console.log(p)); console.log("");}

var cdirs = {
  north: [1,0],
  south: [-1,0],
  west: [0,1],
  east: [0,-1]
};
var data = std.loadFile('14.test');
data = data.trim().split('\n').map(k=>k.split(''));
var h = data.length;

var len = data[0].length;
console.log(len);

function tilt(dir)
{
  var idx = undefined;
  var table = make_table();
  if (cache[dir][table]) {
    idx = cache[dir][table].idx;
    data = JSON.parse(cache[dir][table].tb);
    return idx;
  }

  var vdir = cdirs[dir];

  var rev = (dir === 'south' || dir === 'east');

  if (!rev)
  for (var i = 0; i < data.length; i++)
    for (var j = 0; j < data[0].length; j++)
      roll(i,j,vdir);
  else
    for (var i = data.length-1; i >= 0; i--)
      for (var j = data[i].length-1; j >= 0; j--)
        roll(i,j,vdir);

  var t = {};
  t.idx = Object.keys(cache[dir]).length;
  t.tb = JSON.stringify(data);
  cache[dir][table] = t;
  return t.idx;
}

function cycle() {
  var rr = [];
  rr.push(tilt('north'));
  rr.push(tilt('west'));
  rr.push(tilt('south'));
  rr.push(tilt('east'));
  if (!rr.every(r=>r)) return undefined;
  return rr;
}


var lastcycle = undefined;
for (var i = 0; i < 1000000000; i++) {
  var cc = cycle();
  if (lastcycle && cc)
    if (JSON.stringify(cc) === JSON.stringify(lastcycle))
      break;

  lastcycle = cc;
}

var sum = 0;
sum = data.reduce((acc,line,i) => acc += (line.filter(c => c === 'O').length*(h-i)), 0);

console.log(sum);