문제

https://programmers.co.kr/learn/courses/30/lessons/12934

풀이

function solution(n) {
    let answer = 0;
    const squareRoot = Math.sqrt(n);
    const isInteger = Number.isInteger(squareRoot);
    if (isInteger) {
        answer = Math.pow(squareRoot + 1, 2);
    } else {
        answer = -1;
    }
    
    return answer;
}