#include <bits/stdc++.h>

using namespace std;

int main() {
    int a, b;
    
    cin >> a >> b;
    
    if (a + 1 <= b) {
        cout << "YES" << endl;
    } else {
        cout << "NO" << endl;
    }
    
    cout << abs(a + 1 - b) << endl;
    
    return 0;
}