function stoneBlocks(h: number[]): number {
  const height: number[] = [];
  let index = 0;
  let blocks = 0;

  for (const i of h) {
    while (index > 0 && height[index - 1] > i) {
      index--;
    }
    if (index > 0 && height[index - 1] === i) {
      continue;
    }

    height[index] = i;
    blocks++;
    index++;
  }

  return blocks;
}