#include <iostream>
#include <string>
using namespace std;
int check(int m) {
string str1 = to_string(m * m);
for (int i = 0, j = str1.length() - 1; i <= (str1.length() / 2); i++, j--) {
if (str1[i] == str1[j])
continue;
else
return 0;
}
return 1;
}
int main() {
for (int i = 0; i <= 256; ++i) {
if (check(i))
cout << i << endl;
}
return 0;
}

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