Codefights Sample Solution makeArrayConsecutive2(statues)

function makeArrayConsecutive2(statues) {
    ideal=0;
    real=statues.length;
    sorted = statues.sort(function(a, b){return a-b});
    for(i=sorted[0];i<=sorted[sorted.length-1];i++){
        ideal++;
    }
    statuesNeeded = ideal - real;
    return statuesNeeded;
}