/**
 * Say, a customer requires $247 from an ATM machine. 
 * What is the combination of bank notes ($100, $50, $20, $10, $5, $1) 
 * that satisfies that request?
 */
class RequestBill {
  private pairs: number[][];

  constructor(private amount: number) {
      this.pairs = [];
  }

  get(bill: number) {
    var count = Math.floor(this.amount / bill);
    this.amount -= count * bill;
    this.pairs.push([count, bill])
    return this;
  }

  getPairs() {
      return this.pairs
  }
}

const request = new RequestBill(378);

request.get(100).get(50).get(20).get(10).get(5).get(1);

console.log(request.getPairs())