class Solution {
public int solution(int left, int right) {
// 제곱수인 경우에만 홀수이므로 빼면됨
int sumAll=0;
for (int i = left; i <=right ; i++) {
Double sqrt=Math.sqrt(i);
if(sqrt==sqrt.intValue()){
sumAll-=i;
}
else sumAll+=i;
}
return sumAll;
}
}