06. Squares

#include <iostream>
#include <string>
#include <utility>
#include <vector>
#include <sstream>
#include <cmath>
using namespace std;

vector<int> square_numbers;

void push_suqare_number(int n)
{
 vector<int>::iterator i = square_numbers.begin();

while(i != square_numbers.end() && *i > n)
i++;

square_numbers.insert(i, n);
}

int main()
{
string str;
getline(cin, str);
istringstream istr(str);

int num;
while( istr >> num )
{
int sqrtN = sqrt(num);
if( (sqrtN*sqrtN) == num)
 push_suqare_number(num);
}
for(int n : square_numbers)
cout << n << " ";

cout << endl;
}