Submission #7386394

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Source Code Expand

<?php
fscanf(STDIN, '%d', $n);
$a = array_map('intval', explode(' ', trim(fgets(STDIN))));
$b = array_map('intval', explode(' ', trim(fgets(STDIN))));
$c = array_map('intval', explode(' ', trim(fgets(STDIN))));
$ans = 0;
for ($i = 0; $i < $n; $i++) {
    $ans += $b[$a[$i] - 1];
    if ($i < $n - 1 && $a[$i + 1] - $a[$i] === 1) {
        $ans += $c[$a[$i] - 1];
    }
}
echo $ans . PHP_EOL;

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