Noah2013 @ 2024-06-01 20:03:53

#include<bits/stdc++.h>
using namespace std;
string ISBN;
int main(){             
    cin>>ISBN;//x-xxx-xxxxx-x-
    int last=(ISBN[0]-'0')*1+(ISBN[2]-'0')*2+(ISBN[3]-'0')*3+(ISBN[4]-'0')*4+(ISBN[6]-'0')*5+(ISBN[7]-'0')*6+(ISBN[8]-'0')*7+(ISBN[9]-'0')*8+(ISBN[10]-'0')*9;
    last=last%11;
    char c;
    if(ISBN[12]!='X'&&last!=10&&ISBN[12]-'0'==last) cout<<"Right"<<endl;
    else if(ISBN[12]=='X'&&last==10) cout<<"Right"<<endl;
    else{
        cout<<"Wrong"<<endl;
        for(int i=0;i<ISBN.length()-1;i++) cout<<ISBN[i];
        if(last==10){
            c='X';
            cout<<c;
        }
        else cout<<last;

    }
    return 0;
  }

by Malkin_Moonlight @ 2024-06-01 20:35:36

#include<bits/stdc++.h>
using namespace std;
char a[15];
int main(){
    int sum=0,x=0;
    cin>>a;
    for(int i=0;i<11;i++){
        if(a[i]>='0' && a[i]<='9'){
            if(x==0){
                sum+=1*(a[i]-48);
                x++;
            }else if(x==1){
                sum+=2*(a[i]-48);
                x++;
            }else if(x==2){
                sum+=3*(a[i]-48);
                x++;
            }else if(x==3){
                sum+=4*(a[i]-48);
                x++;
            }else if(x==4){
                sum+=5*(a[i]-48);
                x++;
            }else if(x==5){
                sum+=6*(a[i]-48);
                x++;
            }else if(x==6){
                sum+=7*(a[i]-48);
                x++;
            }else if(x==7){
                sum+=8*(a[i]-48);
                x++;
            }else if(x==8){
                sum+=9*(a[i]-48);
                x++;
            }
        }
    }
    if(sum%11==(a[12]-48)){
        cout<<"Right";
    }else if(sum%11==10 && a[12]=='X'){
        cout<<"Right";
    }else{
        if(sum%11==10){
            a[12]='X';
        }else{
            a[12]=sum%11+48;
        }
        cout<<a;
    }
    return 0;
}