#include <iostream>

int main() {
  int A, B;
  std::cin >> A >> B;
  if (A + 1 <= B) {
    std::cout << "YES" << std::endl;
  } else {
    std::cout << "NO" << std::endl;
  }
  std::cout << std::abs(A + 1 - B) << std::endl;
  return 0;
}