process.stdin.resume();
process.stdin.setEncoding("utf8");
// 自分の得意な言語で
// Let's チャレンジ！！
    var lines = [];
    var reader = require("readline").createInterface({
        input: process.stdin,
        output: process.stdout
    });
reader.on("line", (line) => {
    lines.push(line);
});
reader.on("close", () => {
//入力をスペース区切りで配列に変換
    var e = lines[0].split(" "), h = Number(e[0]), a = (Number(e[1]));
    var t = h / a;
    console.log(Math.ceil(t));
    
});