const getGets = (arr) => {
  let index = 0;

  return () => {
    const toReturn = arr[index];
    index += 1;
    return toReturn;
  };
};
// this is the test
const test = ['-1', '3', '0'];

const gets = this.gets || getGets(test);
const print = this.print || console.log;

let a = +gets();
let b = +gets();
let c = +gets();

const x1 = (-b + Math.sqrt(b ** 2 - 4 * a * c)) / (2 * a);
const x2 = (-b - Math.sqrt(b ** 2 - 4 * a * c)) / (2 * a);

console.log(x1);
console.log(x2);