join & issub nigga

int join(int t1, int t2) {
    if(isSubtype(t1, t2))
        return t2;
    if(isSubtype(t2,t1))
        return t1;
    return join(classesST[t1].superclass, t2);
}

int isSubtype(int sub, int super) {

    if(sub == -1 || super == -1)
        return 0;
    if(sub == -2)
        return 1;
    if(sub == super)
        return 1;
    if(sub == 0)
        return 0;
    if(super == -2)
        return 0;

    int ar[numClasses];
    memset(ar, 0, sizeof(int)*numClasses);
    while(sub != super) {
        if(ar[sub])
            return 0;
        ar[sub] = 1;
        sub = classesST[sub].superclass;
    }
    return 1;
}