#include<cstdio> using namespace std; int Reverse(int n){ int reverse = 0; int remain; while(true){ remain = n%10; reverse = 10*reverse + remain; n = n/10; if(n == 0){ break; } } return reverse; } int main(){ int i = 0; for(i = 0; i <= 256; ++i){ if(i*i == Reverse(i*i)){ printf("%d\n",i); } } }