#include<iostream>
#include<string>
#include<algorithm>
#include<cctype>
#include<set>
#include<bitset>
#include<math.h>
#include<map>
#include<queue>
#include<iomanip>
using namespace std;

int main(){
    int a, b;
    cin >> a >> b;
    cout << ((a < b) ? "YES" : "NO") << endl;
    cout << max(0, a-b+1) << endl;    
}