export default async function runner(inputPath: string) {
  const input = (await Bun.file(inputPath).text()).trimEnd();
  
  const field: string[][] = []
  const splitters: Map<string, number> = new Map()
  
  input.split("\n").forEach(value => field.push(value.split("")));
  
  field[0]!.forEach((c, i) => {
    if(c === "S") console.log(recurse(i, 0, field, splitters));
  })
}

function recurse(x: number, y: number, field: string[][], splitters: Map<string, number>){
  if(y>=field.length) return 1;
  if(y<0 || x<0 || x>field[y]!.length) return 0;
  if(field[y]![x] === "^") {
    let paths = 0;
    if(splitters.has(`${x}|${y}`)) return splitters.get(`${x}|${y}`)!;
    paths += recurse(x-1, y, field, splitters);
    paths += recurse(x+1, y, field, splitters);
    splitters.set(`${x}|${y}`, paths)
    return paths;
  }
  return recurse(x, y+1, field, splitters);
}