https://school.programmers.co.kr/learn/courses/30/lessons/77884
문제 설명
제한사항
class Solution {
public int solution(int left, int right) {
int calc = 0;
for (int i = left; i <= right; i++) {
int cnt = 0;
for (int j = 1; j <= i; j++) {
if(i % j == 0) {
cnt++;
}
}
if(cnt % 2 == 0) {
calc += i;
} else if(cnt % 2 == 1) {
calc -= i;
}
}
int answer = calc;
return answer;
}
}