ISBN号码

#include <iostream>
#include <string>
using namespace std;

string validateIDCard(const string& idCard) {
    if (idCard.length() != 18) {
        return "No";
    }

    int weights[] = {7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2};
    char checkCodes[] = "10X98765432";

    int total = 0;
    for (int i = 0; i < 17; i++) {
        int digit = idCard[i] - '0';
        int weight = weights[i];
        total += digit * weight;
    }

    int checkCodeIndex = total % 11;
    if (idCard[17] == checkCodes[checkCodeIndex]) {
        return "Yes";
    } else {
        return "No";
    }
}

int main() {
    string idCard;
    cin >> idCard;

    string result = validateIDCard(idCard);
    cout << result << endl;

    return 0;
}