<?php
$s = trim(fgets(STDIN));
$s = explode(" ", $s);

if ($s[0] + 1 >= $s[1]) {
    echo "Yes".PHP_EOL;
    echo abs($s[0] + 1 - $s[1]).PHP_EOL;
} else {
    echo "No".PHP_EOL;
    echo abs($s[0] + 1 - $s[1]).PHP_EOL;
}
?>