#include<bits/stdc++.h>
#define rep(i,a,b) for(int i=int(a);i<int(b);++i)
using namespace std;
typedef long long ll;
int INF = (1LL << 30) - 1;
int MOD = 1e9+7;
main(){
    int A,B;
    cin >> A >> B;
    A += 1;
    if(A <= B)cout << "YES" << endl;
    else cout << "NO" << endl;
    cout << max(A,B) - min(A,B) << endl;
}