const 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 input: string = lines[0]
  const arr: number[] = input.split(' ').map(str => parseInt(str, 10))
  const men = arr[0]
  const women = arr[1]
  const result = women >= men + 1 ? true : false
  if (result) {
    console.log('YES');
    console.log(women - (men + 1));
  } else {
    console.log('NO');
    console.log((men + 1) - women);
  }
});