public void set(int index, long value) {final int o = index / 3;final int b = index % 3;final int shift = b * 21;blocks[o] = (blocks[o] & ~(2097151L << shift)) | (value << shift);}
public override void Set(int index, long value){int o = index / 3;int b = index % 3;int shift = b * 21;blocks[o] = (blocks[o] & ~(2097151L << shift)) | (value << shift);}