回文数组

#include <iostream>
#include <string>

using namespace std;

int main()
{
string str;
int n;
getline(cin,str);
n = str.size();
for (int i=0; i<n/2; i++)
{
if (str[i] != str[n-1-i])
{
cout << "NO" <<endl;
return 0;
}
}
cout << "YES" << endl;
return 0;
}