#include <iostream>
using namespace std;

int main(){
    
    int a,b,tmp;
    cin >> a >> b;
    
    if(a < b)
        cout << "YES" << "\n";
    else
        cout << "NO" << "\n";
        
    tmp = b - a - 1;
    if(tmp < 0)
        tmp *= -1;
        
    cout << tmp << "\n";
    return 0;
}