[Programmers] Lv1. 부족한 금액 계산하기 (JavaScript)

문제

 

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풀이

1차

function solution(price, money, count) {
    let result = 0;
    
    for(let i = 1; i <= count; i++) {
        result += price * i;
    }
    
    return result - money === 0 || result - money < 0 ? 0 : result - money ;
}

 

 

2차

function solution(price, money, count) {
    let result = price * count * (count + 1) / 2 - money;
    return result === 0 || result < 0 ? 0 : result;
}

 

 

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