题解 | #[NOIP2008]ISBN号码#

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#include <array>
#include <csignal>
#include <iostream>
using namespace std;

int main() {
    string ISBN;
    int len;
    int sum = 0;
    int index = 1;
    char res;

    cin >> ISBN;

    len = ISBN.size();

    for (int i = 0; i < len - 2; i++) {
        if (ISBN[i] == '-') {
            continue;
        }

        sum += (ISBN[i] - '0') * index;
        index++;
    }

    if (sum % 11 == 10) {
        res = 'X';
    } else {
        res = sum % 11 + '0';
    }

    if (res == ISBN[len - 1]) {
        cout << "Right";
    } else {
        ISBN[len - 1] = res;
        cout << ISBN;
    }

    return 0;
}



/*
int main() {
    int language;
    int press;
    int number;
    char check;
    int index = 9;
    int sum = 0;
    char res;
    int temp = 0;
    array<int, 10> ISBN = {0};

    scanf("%1d-%3d-%5d-%1c", &language, &press, &number, &check);
    // printf("%d %d %d %d", language, press, number, check);

    temp = number;
    while (temp > 0) {
        ISBN[index--] = temp % 10;
        temp /= 10;
    }

    temp = press;
    while (temp > 0) {
        ISBN[index--] = temp % 10;
        temp /= 10;
    }

    ISBN[index] = language;

    for (int i = 1; i < 10; i++) {
        // cout << ISBN[i];
        sum += ISBN[i] * i;
    }

    // for (int i : ISBN) {
    //     cout << i;
    // }

    // cout << sum;
    res = sum % 11 + '0';

    if (res == '10') {
        res = 'X';
    }

    if (res == check) {
        printf("Right\n");
    } else {
        printf("%d-%d-%d-%c\n", language, press, number, res);
    }

    return 0;
}
*/