Rsa97

int scanf ( const char * format );
int scanf ( const char * format, argument );
int scanf ( const char * format, argument1, argument2 );

-      1   2   3   4   5   6   7   8   9
x1     I  II  III  IV  V  VI  VII VIII IX
x10    X  XX  XXX  XL  L  LX  LXX LXXX XC
x100   C  CC  CCC  CD  D  DC  DCC DCCC CM
x1000  M  MM  MMM

var docNode = doc.DocumentNode;
var tables = docNode.SelectNodes("//table[@class='table-data']");
var trs = tables.Elements("tr");
var trList = trs.ToList();