#include <iostream>

using namespace std;
int main(void){
    // Your code here!
    int A,B;
    cin >> A >> B;
    
    if(B - A >= 1){
        cout << "YES" << endl;
        cout << B-A-1 << endl;
    }else{
        cout << "NO" << endl;
        cout << abs(B-A-1) << endl;
    }
}