public class genlist<T>{
        public T[] data;
        public int size => data.Length;
        public T this[int i] => data[i];
        public genlist(){ data = new T[0]; }
        public void add(T item){
                T[] newdata = new T[size+1];
                for(int i=0;i<size;i++)newdata[i]=data[i];
                newdata[size]=item;
                data=newdata;
        }
}