์ฝ๋
const fs = require('fs');
let input = +fs.readFileSync('/dev/stdin').toString().trim().split(' ');
let change = 1000 - input;
let count = 0;
count += Math.floor(change / 500);
change = change % 500;
count += Math.floor(change / 100);
change = change % 100;
count += Math.floor(change / 50);
change = change % 50;
count += Math.floor(change / 10);
change = change % 10;
count += Math.floor(change / 5);
change = change % 5;
count += Math.floor(change / 1);
change = change % 1;
console.log(count);