#include <iostream>
using namespace std;
int main() {
ios_base::sync_with_stdio(false);
cin.tie(NULL);
long long N;
cin >> N;
long long ban_dau = N;
long long dao_nguoc = 0;
while (N > 0) {
long long chu_so_cuoi = N % 10;
long long dao_nguoc = dao_nguoc * 10 + chu_so_cuoi;
N = N / 10;
}
if (ban_dau == dao_nguoc) {
cout << "YES";
}
else {
cout << "NO";
}
return 0;
}
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