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class GridMaster {    #row = 0;    #col = 0;    #grid: number[][];    static #directions = { L: [0, -1], R: [0, 1], U: [-1, 0], D: [1, 0] };    constructor(grid: number[][]) {        this.#grid = grid;
        grid.forEach((a, i) =>            a.forEach((v, j) => {                if (v === -1) {                    this.#row = i;                    this.#col = j;                }            })        );    }    canMove(direction: string): boolean {        const row = this.#row;        const col = this.#col;        if (Reflect.has(GridMaster.#directions, direction)) {            const [a, b] = Reflect.get(GridMaster.#directions, direction);            const value = this.#grid[row + a]?.[col + b];
            return Boolean(value);        }
        return false;    }    move(direction: string): void {        if (this.canMove(direction)) {            const row = this.#row;            const col = this.#col;            const [a, b] = Reflect.get(GridMaster.#directions, direction);
            [this.#row, this.#col] = [row + a, col + b];
            return;        }    }    isTarget(): boolean {        return this.#grid[this.#row][this.#col] === 2;    }}export { GridMaster as GridMaster };