egn

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

bool isValidEGN(const std::string& egn)
{
    //egn digs
    int x1 = egn[0] - '0';
    int x2 = egn[1] - '0';
    int x3 = egn[2] - '0';
    int x4 = egn[3] - '0';
    int x5 = egn[4] - '0';
    int x6 = egn[5] - '0';
    int x7 = egn[6] - '0';
    int x8 = egn[7] - '0';
    int x9 = egn[8] - '0';
    int x10 = egn[9] - '0';
    //y/m/d
    int year = std::stoi(egn.substr(0, 2));
    int month = std::stoi(egn.substr(2, 2));
    int day = std::stoi(egn.substr(4, 2));
    if (year < 10)
    {
        month += 20;
    }
    else if (year >= 100)
    {
        month += 40;
    }
    //egn check
    if (month < 1 || month > 12 || day < 1 || day > 31)
    {
        return 1;
    }
    int sum = 2 * x1 + 4 * x2 + 8 * x3 + 5 * x4 + 10 * x5 + 9 * x6 + 7 * x7 + 3 * x8 + 6 * x9;
    int remainder = sum % 11;
    if (remainder == 10)
    {
        remainder = 0;
    }
    if (remainder != x10)
    {
        return 1;
    }
    return 0;
}

int main()
{
    string egn;
    // Input egn
    cin >>egn;
    if (egn.length() != 10)
    {
        cout << "Invalid input data!" <<endl;
        return 0;

    }

    if (isValidEGN(egn))
    {
        cout<< 0;
    }
    else
    {
       cout<< 1;
    }


}