function spiralOrder(matrix: number[][]): number[] {
if (matrix.length === 0 || matrix[0].length === 0) return [];
const result: number[] = [];
let top = 0, bottom = matrix.length - 1;
let left = 0, right = matrix[0].length - 1;
while (top <= bottom && left <= right) {
for (let i = left; i <= right; i++) result.push(matrix[top][i]);
top++;
for (let i = top; i <= bottom; i++) result.push(matrix[i][right]);
right--;
if (top > bottom || left > right) break;
for (let i = right; i >= left; i--) result.push(matrix[bottom][i]);
bottom--;
for (let i = bottom; i >= top; i--) result.push(matrix[i][left]);
left++;
}
return result;
}