#include <iostream>
using namespace std;

int main()
{
    int a, b, num;
    cin >> a >> b;
    if (a < b)
    {
        num = b - a - 1; 
        cout << "YES" << endl << num << endl;
    }
    else
    {
        num = a + 1 - b;
        cout << "NO" << endl << num << endl;
    }
}