function solution(left, right) {
let answer = 0;
for (let i = left; i <= right; i++) {
let arr = [];
for (let j = 0; j <= i; j++) {
if (i % j === 0) {
arr.push(j);
}
}
arr.length % 2 === 0 ? (answer += i) : (answer -= i);
}
return answer;
}
// 단순하게 하나씩 구하여 풀기
function solution(left, right) {
var answer = 0;
for (let i = left; i <= right; i++) {
if (Number.isInteger(Math.sqrt(i))) {
answer -= i;
} else {
answer += i;
}
}
return answer;
}
//수학적 개념 활용 풀기