<?php
fscanf(STDIN,"%d%d%d",$N,$M,$K);
for($i=0;$i<$N;++$i) $a[$i] = array_map('intval',explode(" ", trim(fgets(STDIN))));

$old[0] = true;
for($i=0;$i<$N;++$i){
    $new = [];
    for($j=0;$j<$M;++$j){
        foreach($old as $p => $v){
            if($a[$i][$j]+$p <= $K) $new[$a[$i][$j]+$p] = true;
        }
    }
    $old = $new;
}
if(count($new) == 0) echo -1 . PHP_EOL;
else echo $K - max(array_keys($new)) . PHP_EOL;

?>