Check if Grid Satisfies Conditions

export function satisfiesConditions(grid: number[][]): boolean {
  const [m, n] = [grid.length, grid[0].length];
 
  for (let i = 0; i < m; i++) {
    for (let j = 0; j < n; j++) {
      if (i < m - 1 && grid[i][j] !== grid[i + 1][j]) {
        return false;
      }
      if (j < n - 1 && grid[i][j] === grid[i][j + 1]) {
        return false;
      }
    }
  }
 
  return true;
}