参考答案：

#include<iostream>

using namespace std;

int main()
{
    int a;

    cin >> a;
    if ((a - 1) % 2 == 0) cout << "Yes" << endl;
    else cout << "No" << endl;

    return 0;
}

Python:

a = int(input())
if a%2 == 0:
    print("No")
else:
    print("Yes")