<?php $n = trim(fgets(STDIN)); $points = trim(fgets(STDIN)); $points = explode(' ', $points); $answer = trim(fgets(STDIN)); $answer = explode(' ', $answer); for ($i = 0; $i < $n; $i++) { $sum[$answer[$i]] += $points[$i]; } $flag = true; foreach ($sum as $value) { if ($sum[0] < $value) { $flag = false; break; } } if ($flag) { echo 'YES' . "\n"; } else { echo 'NO' . "\n"; }