AOC 2022 Day 4 parts 1+2 (AWK)

#### PART 1 ####
{
        split($0, ar, ",");
        left = nrSeq(ar[1]); right = nrSeq(ar[2]);
        if (left ~ right || right ~ left) { result ++; }
}

END { print result; }

func nrSeq(seq,    i,result, ar) {
        split(seq, ar, "-");
        for (i=ar[1]; i<=ar[2]; i++) {result =result "L" i "R"; }
        return result;
}

#### PART 2 ####
{
        split($0, ar, ",");
        delete arLeft; fillAr(arLeft, ar[1]);
        delete arRight; fillAr(arRight, ar[2]);
        for (i in arLeft) {
                if (i in arRight) { result ++; break; }
        }
}

END { print result; }

func fillAr(ar, seq,   i) {
        split(seq, tmpAr, "-");
        for (i=tmpAr[1]; i<=tmpAr[2]; i++) {
                ar[i] = 1;
        }
        return r;
}