#include <iostream>
using namespace std;
#define rep(i, n) for(int i = 0; i < (n); i++)

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