<?php

$n = intval(readline());
$currentSum = 0;
$previousSum = 0;
$diff = 0;
$maxDiff = 0;

for ($i = 0; $i < $n; $i++) {
    $previousSum = $currentSum;
    $currentSum = 0;
    $currentSum += intval(readline());
    $currentSum += intval(readline());

    if ($i != 0) {
        $diff = abs($currentSum - $previousSum);
        if ($diff != 0 && $diff > $maxDiff) {
            $maxDiff = $diff;
        }
    }
}

if ($previousSum == $currentSum || $n == 1) {
    echo "Yes, value=" . $currentSum;
} else {
    echo "No, maxdiff=" . $maxDiff;
}