export { }
let lines = [];
const reader = require('readline').createInterface({
  input: process.stdin,
  output: process.stdout
});
reader.on('line', function (line) {
  lines.push(line);
});
reader.on('close', function () {

  const man: number = parseInt(lines[0])
  const woman: number = parseInt(lines[1])
  let surplus: number = 0

  // if (woman > man) {
  //   console.log('YES')
  // } else {
  //   console.log('NO')
  // }

  if (woman === man + 1) {
    console.log('YES')
    console.log(0)
  } else if (woman > man) {
    const hoge = woman - man - 1
    // surplus = Math.abs(woman - man) - 1
    console.log(hoge)
  } else {
    console.log('NO')
    const hoge = woman - man + 1
    // surplus = Math.abs(woman - man) + 1
    console.log(hoge)
  }

});