function main(input) {
  	'use strict'
	let arr = input.split(" ");
  	let H = arr[0]
    const A = arr[1]
	let flg = true;
  	let indx = 0;
    while (flg){
      H -= A
      indx ++;
      if(H <= 0){
      	flg = false;
      }
    }
    console.log(indx)
}
main(require("fs").readFileSync("/dev/stdin", "utf8"));