#include <bits/stdc++.h> using namespace std; int c() { for(int x = 1; ; x++) { int n = x * x; if(n < 1000) continue; if(n > 9999) break; int in = n / 100; int be= n % 100; if(in/10 == in%10 && be/10 == be%10) printf("%d\n", n); } } int main() { c(); return 0; }