#include<iostream>
#include<algorithm>
#include<cstdio>
#include<cstdlib>
#include<vector>
#include<string>
#include<sstream>
#include<cmath>
#include<numeric>
#include<map>
#include<stack>
#include<queue>
using namespace std;


int main(void) {
  long long 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;
}






// EOF