PHP solutions

unimportant = 0; foreach (key => $value) {

     if ($value[1] == 1) {
         `$importantContest[] = $`value[0];
     }
     else
     {
        `$unimportant+= $`value[0];
     }

    }
    rsort($importantContest);

    `$len = count($`importantContest);
    for (`$i=0; $`i < `$len; $`i++) { 
        if(`$i < $`k)
        {
            `$unimportant+=$`importantContest[$i];
        }
        else
        {
            `$unimportant-=$`importantContest[$i];
        }

    }
    echo $unimportant;