[C++] 백준 1977번 : 완전제곱수

https://www.acmicpc.net/problem/1977

#include <iostream>

#include <math.h>

using namespace std;

int main() {

int n1, n2;

cin >> n1 >> n2;

////int i = sqrt(n1);

//int tmp = sqrt(n1);

//tmp *= tmp;

////tmp = n1 ? i++ : 0;

int flag = 0, sum =0,min=0;

for (int i = n1; i <= n2; i++) {

if (i == ((int)sqrt(i)*sqrt(i)))

{

sum += i;

if ((flag == 0) && i != 0)

{

flag = 1;

min = i;

}

}

}

if (flag == 0)

cout <<  "-1\n";

else

cout << sum << "\n" << min << "\n";

}