题解 | #[NOIP2008]ISBN号码#

#include<bits/stdc++.h>
using namespace std;
int main()
{
    string tmp;
    cin>>tmp;
    regex reg("^[0-9]-[0-9]{3}-[0-9]{5}-([0-9]|X)$");
    if(regex_match(tmp,reg))
    {
        string r = tmp;
        tmp.erase(remove(tmp.begin(),tmp.end(),'-'), tmp.end());
        string str;
        str = tmp[tmp.length()-1];
        int fin = (str=="X")?10:stoi(str.c_str());
        tmp.pop_back();
        int n = 0;        
        for(int i = 1;i<10;i++)
        {
            str = tmp[i-1];
            n += i*(stoi(str.c_str()));
        }
        n%=11;
        if(n==fin)
            cout<<"Right"<<endl;
        else
        {
            r.pop_back();
            r+=((n==10)?"X":to_string(n));
            cout<<r<<endl;
        }
    }
    return 0;
}