Node.js) 백준 5585번: 거스름돈

https://www.acmicpc.net/problem/5585

5585번: 거스름돈

const input = +require('fs').readFileSync('./dev/stdin').toString().trim();

let cnt = 0;
let rest = 1000 - input;
while (rest > 0) {
        if (rest >= 500) {
                rest -= 500;
        } else if (rest >= 100) {
                rest -= 100;
        } else if (rest >= 50) {
                rest -= 50;
        } else if (rest >= 10) {
                rest -= 10;
        } else if (rest >= 5) {
                rest -= 5;
        } else if (rest >= 1) {
                rest -= 1;
        }
        cnt++;
}
console.log(cnt);