#include <iostream> #include <cstring> using namespace std; int main() { int n,a = 0,b = 0,c = 0; cin>>n; for(int i=1;i<=n;i++){ c = i; b = 0; while(c){ a = c % 10; c = c/10; b = b*10+a; } if(i == b){ cout<<i<<endl; } } }