const main = stdin => {
  const input = stdin.trim().split('\n')
  const [H, A] = input[0].split(' ').map(x => parseInt(x))

  let count = 0
  let hp = H
  while (hp > 0) {
    hp -= A
    count++
  }

  console.log(count)
}

// 標準入力
main(require("fs").readFileSync("/dev/stdin", "utf8"))
