#include    <iostream>
#include    <fstream>
#include    <cmath>

using namespace std;

ifstream fin("bac.txt");

bool ePatrat(int nr) {
    if(int(sqrt(nr)) == sqrt(nr))
        return true;
    return false;
}
int main()
{
    int V[1000], total = 0;
    int coord_start = -1, coord_end = -1;

    while(fin >> V[++total])
    {
        if(ePatrat(V[total]) && coord_start == -1)
            coord_start = total;
        else if(ePatrat(V[total]) && coord_start != -1)
            coord_end = total;
    }

    int lungimea = coord_end - coord_start + 1;
    
    cout << lungimea << "\n";
    for(int i = coord_start; i <= coord_end; i++)
        cout << V[i] << " ";
}