/**
 * 
**/
#include "bits/stdc++.h"
//#include<boost/multi_array.hpp>
//#include<boost/optional.hpp>
//#include<boost/range/irange.hpp>
//#include<boost/range/algorithm.hpp>
//#include<boost/range/adaptors.hpp>
using namespace std;
using ll = long long;
using ld = long double;
using P = pair<int, int>;
using vi = vector<int>;
using vvi = vector<vi>;
#define rep(i, n) for(int i = 0; i < (n); i++)
#define rep2(i, x, n) for(int i = x; i < (n); i++)
#define all(n) begin(n), end(n)
// struct cww{cww(){ios::sync_with_stdio(false);cin.tie(0);}}star;
// const long long INF = numeric_limits<long long>::max();
#define debug(var)                                                             \
   do {                                                                        \
      std::cout << #var << " : ";                                              \
      view(var);                                                               \
   } while(0)
template <typename T> void view(T e) { std::cout << e << std::endl; }
template <typename T> void view(const std::vector<T> &v) {
   for(const auto &e : v) {
      std::cout << e << " ";
   }
   std::cout << std::endl;
}
template <typename T> void view(const std::vector<std::vector<T>> &vv) {
   for(const auto &v : vv) {
      view(v);
   }
}

void Main() { //
   int a, b;
   cin >> a >> b;
   if(a + 1 <= b){
      cout << "YES" << endl;
   }else{
      cout << "NO" << endl;
   }
   cout << max(a + 1, b) - min(a + 1, b) << endl;
} //

int main() {
   std::cin.tie(nullptr);
   std::ios_base::sync_with_stdio(false);
   std::cout << std::fixed << std::setprecision(15);
   Main();
   return 0;
}