"use strict"
function Main(input) {
  input = input.trim().split(' ').map(Number);
  let h = input[0];
  let a = input[1];

  let ans = 0;
  while(h>0){
    h = h-a
    ++ans;
  }

  console.log(ans);
}
Main(require("fs").readFileSync("/dev/stdin", "utf8"));