Off white cow month race 21 F

AC Code

#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <cmath>
#include <iostream>
#include <algorithm>
using namespace std;
int main()
{
    string a;
    cin>>a;
    int len=a.size();
    if(a[len-1]%2==0)cout<<"1"<<endl;
    else cout<<"-1"<<endl;
   return 0;
}