#include <bits/stdc++.h>

using namespace std;

int main() {
    int a, b;
    cin >> a >> b;

    if (a+1 <= b) {
        puts("YES");
        cout << b-(a+1) << endl;
    } else {
        puts("NO");
        cout << a+1-b << endl;
    }

    return 0;
}