코딩테스트 연습 - 위클리첼린지 1주차 부족한금액계산하기

  @org.junit.Test
    public void price_return_test1(){
        int price = 3;
        int money = 20;
        int count = 4;
        long answer = -1;

        long castingTotalPrice = (long)price;

        for(int i=2; i <= count; i++){
            castingTotalPrice += price * i;
        }

        if(castingTotalPrice > money){
            answer = castingTotalPrice-money;
        }else {
            answer = 0;
        }

        System.out.println(answer);
    }