"use strict";
const Main = (input) =>{
   let xs = input.trim().split(' ').map(v=>parseInt(v,10));
   let HP = xs[0];
   let attack = xs[1];
   let count = 1;
   
   while(HP>attack){
       count++;
       HP = HP-attack;
   }
   console.log(count);

}
Main(require('fs').readFileSync('/dev/stdin','utf8'));